Fastly subdomain takeover Designed for bug bounty hunters and security researchers. Contribute to martinvw/subdomain-takeover-tools development by creating an account on GitHub. $ subfinder -dL domains. Fastly doesn't require any proof of DNS ownership to register new distributions that use a given domain, so I was able to effectively take it over. p. PenTest Magazine 15,425 followers 4h [FREE ACCESS ARTICLE] Fastly Subdomain Takeover $2000 https://lnkd. a subdomain takeover # Bug Hunting#Account Takeover#fastly errorTakeover account via fastlyfastly error account takeover May 9, 2022 · A subdomain takeover is a vulnerability which allows an attacker to take the control of a subdomain which is not owned by that attacker. The vulnerability was an edge case and could only be exploited when certain conditions were met. Overview ¶ Subzy is a fast subdomain takeover vulnerability scanner that detects dangling DNS records and identifies potential subdomain takeover opportunities. 7 www. Contribute to Yash-ax/fastly-host development by creating an account on GitHub. This post demonstrates how to create a subdomain takeover PoC for various cloud providers. Subdomain Takeover PoC Via fastly. local/nuclei-templates/http Jun 14, 2023 · Subdomain takeovers pose a significant security risk to organizations, potentially allowing malicious actors to gain unauthorized control over abandoned or misconfigured subdomains. Jun 14, 2024 · Really cool finding and even cooler sub-takeover page. What is a Subdomain? 🚀 Check out the latest blog post on Pentest Magazine: "Fastly Subdomain Takeover: 2000+ Vulnerable Domains"! Learn about the critical vulnerability and how to prevent subdomain takeover. 7 prod. ⚡ SubOver → Fast detection across services. With businesses relying on third-party platforms like GitHub Pages, Zendesk, Shopify, and Heroku, modern takeovers go far beyond just misconfigured CNAMEs. At ValluvarSploit Security, we are p Nov 21, 2022 Bug Bounty Learning Objectives: Understand the core methodology for identifying potentially vulnerable subdomains. fastlylb. I am the founder and CEO of ValluvarSploit Security. in/gKkvvygt #infosec #bugbounty #cybersecurity #subdomaintakeover Mar 15, 2021 · Sub 404 is a tool written in python which is used to check possibility of subdomain takeover vulnerabilty and it is fast as it is Asynchronous. ssl. Contribute to Stratus-Security/Subdominator development by creating an account on GitHub. May 23, 2023 · Subdomain Takeover Checking for Subdomain Takeover Vulnerabilities : Nuclei is an open-source project that provides a framework for fast and customizable vulnerability scanning. PenTest Magazine 18,011 followers 7h [FREE ACCESS ARTICLE] Fastly Subdomain Takeover $2000 https://lnkd. Nov 21, 2022 · Fastly Subdomain Takeover $2000 Bug Bounty — From zero to HERO Nov 21, 2022 11 Overview ¶ Subzy is a fast subdomain takeover vulnerability scanner that detects dangling DNS records and identifies potential subdomain takeover opportunities. findomain & httpx] Total_Fingerprints (Aquatone + Subjack + Subzy Apr 28, 2025 · Step-by-Step Guide to Find Subdomain Takeover This is the guaranteed method to find takeover opportunities across large scopes (including wildcard scopes like *. fastly. For too long, websites have relied on Jan 18, 2024 · Write up about how I successfully took over the subdomain of an AWS/S3 bucket. Aug 21, 2018 · Uber actually had more than one subdomain takeovers in the past. Since Detectify's fantastic series on subdomain takeovers, the bug bounty industry has seen a rapid influx of reports concerning this type of issue. Subdomain takeover vulnerabilities represent a critical and often high-impact security flaw where an attacker can seize control of a subdomain pointing to a deprovisioned third-party service. when I did your DNS enumeration i came across :- Ip Address Target Name ---------- ----------- 151. Sep 14, 2018 · when you attempt to add a custom domain on Netlify, they ask you to add a randomly-named cname record for them to verify. org so another user would not be able to register it. net' is already taken by May 15, 2024 · In this article, we shed light on Subdomain Takeovers and discuss 3 things: What is a Subdomain Takeover? How to exploit them? How to find them? The Internets #1 Subdomain Takeover Tool. com to Lyst - 161 upvotes, $1000 Hacker. I will try to keeps things clear and easier for everyone to ## Summary The domain **addons-preview-cdn. Kitploit We're Under Maintenance Our website is currently undergoing scheduled maintenance. Fastly Subdomain Takeover $2000 - PentestmagRead how Alexander found his 2000$ Bug! My name is Alexandar Thangavel AKA ValluvarSploit, a full-time bug hunter and trainer. Subjack will also check for subdomains attached to domains that # You need to claim the subdomain / CNAME of the subdomain to confirm the takeover. This exploit can lead to phishing campaigns, data theft, and significant reputational damage, making it a prized finding in any bug bounty program. pif file extensions can be used to run executables? And that the extension isn’t visible even with Show File Extension options? I created a PoC Oct 31, 2022 · Subdomain takeover is a bug with high (or potentially critical) severity. It's obviously not vulnerable anymore because they either removed the DNS record or just registered their Fastly instance again. Learn to verify and exploit a subdomain takeover, specifically against a common service like Fastly. The basic premise of a subdomain takeover is a host that points to a particular service not currently in use Sep 18, 2025 · My approach of subdomain takeover that pointing to Fastly (DNS Hijacking) I begin in the name of Almighty Allah. net”) and website fingerprint “Fastly error: unknown domain”, we can confirm that this is Fastly Subdomain Takeover. ly/2orn50Qek9c #infosec #cybersecurity #redteam #pentest #pentesting #hacking #hackers #coding #opensource #Linux #windows Aug 1, 2023 · 10 storiesRecently I managed to find a subdomain takeover on azurewebsite on a private program on hackerone. Contribute to OctaYus/FastlySubdomainTakeover development by creating an account on GitHub. . NtHiM stands for "Now, the Host is Mine!", and it is a Super Fast Sub-domain Takeover Detection tool checks for Fastly subdomain takeover. Nov 21, 2022 · By taking a look at CNAME record (“redacted. net 151. com it will not be possible to register the subdomain. txt Feb 20, 2025 · 12 Ways to Prevent Subdomain Takeovers Knowing the risks associated with subdomain takeovers is the first step; the real work begins when implementing countermeasures. It also offers a database of sites vulnerable to subdomain takeover (public results), along with detailed metadata like IP, CNAME, TITLE, and STATUS CODE for reconnaissance to identify potential new vulnerabilities Fastly Subdomain Takeover $2000 Bug Bounty — From zero to HERO by Alexandar Thangavel AKA ValluvarSploit WHOAMI My name is … Fastly Subdomain Takeover $2000 infosecwriteups. Apr 25, 2023 · Subdomain takeover is a serious security risk that can leave your website vulnerable to attacks. in/dtbKbZ_A #pentestmag #article #subdomain #takeover #cybersecurity #pentesting #bugbounty Subhunter A fast subdomain takeover tool Description: Subdomain takeover is a common vulnerability that allows an attacker to gain control over a subdomain of a target domain and redirect users intended for an organization's domain to a website that performs malicious activities, such as phishing campaigns, stealing user cookies, etc. in/gKkvvygt #infosec #bugbounty #cybersecurity #subdomaintakeover Apr 7, 2025 · Fastly Subdomain Takeover $2000 Bug Bounty — From zero to HERO Nov 21, 2022 In Sep 19, 2023 · Fastly Subdomain Takeover $2000 Bug Bounty — From zero to HERO by Alexandar Thangavel AKA ValluvarSploit WHOAMI My name is … PenTest Magazine 18,666 followers 6h Fastly Subdomain Takeover $2000 https://lnkd. txt | httpx nstall Subzy Tool on Kali Linux 🐉 | Subdomain Takeover Tutorial 🚀 Learn how to install and run the Subzy tool on Kali Linux for fast subdomain takeover detection! This powerful tool helps Dec 30, 2017 · The "Fastly error: unknown domain:" error isn't guaranteed that the subdomain takeover will work , if the user has registered the full *. in/dtbKbZ_A #pentestmag #article #subdomain #takeover #cybersecurity #pentesting #bugbounty Mar 3, 2025 · This indicates that the subdomain was previously hosted on Google Sites. So, having done a bit of research on this recently, I thought I’d share what I’ve learned in hopes it helps someone. Written in Go, based on @haccer's subjack. A Subdomain takeover is a cybersecurity vulnerability where attackers exploit abandoned or misconfigured subdomains, gaining unauthorized control. com) is pointing to a service (e. com via subdomain takeover of saostatic. Sep 15, 2023 · Fastly Subdomain Takeover $2000 Bug Bounty — From zero to HERO Nov 21, 2022 BrownBearSec Dec 29, 2023 · Fastly Subdomain Takeover $2000 Bug Bounty — From zero to HERO Nov 21, 2022 12 Apr 7, 2025 · 🚀 **Subdomain Takeover Detection with Nuclei** Detect vulnerable subdomains fast! Scan AWS, Heroku, and more for takeover risks with this lightweight, customizable template. That being said how is it possible that the main domain is not claimed? Did you just put in your own subdomain (unrelated to Pandora) and hoped it would work or did that subdomain pop-up during recon as a fastly subdomain? Edit: I tried testing the above out and I got the following error: Fastly error: unknown domain: [SubtakeoverPOC Apr 28, 2023 · What is subdomain Takeover When attackers gain complete control of their target subdomain this happens when the CNAME of the subdomain is misconfigured. Unless i've missed a trick? Feb 3, 2025 · Find subdomains vulnerable to takeover fast! Use it with our Subdomain Finder tool for best results. Oct 18, 2024 · Using custom subdomains can open your application to potential security issues. Hi, I've found a Shopifu cdn domain here which had an instance of fastly setup but did not remove the dns record when the service was cancelled. May 11, 2020 · We’ve encountered many Fastly pages and couldn’t succeed in hijacking it. # Do not report subdomain takeover issues only based on detection. 🚀 Takeover → Simple automation tool. By understanding how Fastly Subdomain takeover happens and implementing best practices to prevent it, you can protect your website from potential threats and ensure the security of your users’ data. g. May 7, 2020 · Talked about how to find subdomain takeover on a large scale. Today, I am going to share how I found Fastly subdomain takeover vulnerability and earn my first four digits bounty. Remember to regularly review your DNS settings, remove unused subdomains, monitor subdomains, and # You need to claim the subdomain / CNAME of the subdomain to confirm the takeover. net Except the first domain name , the rest two CName point to an unclaimed domain on Automatic finder for subdomains vulnerable to takeover. Uses CNAME record for verification of findings. Jun 14, 2023 · Fastly Subdomain Takeover $2000 Bug Bounty — From zero to HERO Nov 21, 2022 8 Nov 21, 2022 8 Take a look at Fastly Subdomain Takeover $2000 https://lnkd. Contribute to 0x-snpaii/HackerOne-Reports development by creating an account on GitHub. Dec 31, 2023 · Writeup about how I successfully took over the subdomain. ~-~~-~~~-~~-~ Please watch: "Uncovering an account takeover vulnerability: auth bypass via response Fastly Subdomain Takeover $2000 infosecwriteups. A DNS record was found that was pointing to Fastly, but there was no Fastly service configured for this domain. This blog post tells the story of how a bug hunter found a subdomain takeover vulnerability. Jan 3, 2023 · Subdomain takeover vulnerabilities are, in most cases, the result of an organization using an external service and letting it expire. Master the use of open-source intelligence (OSINT) and scanning tools for enumeration. Aug 15, 2018 · HackerOne's Hacktivity feed — a curated feed of publicly-disclosed reports — has seen its fair share of subdomain takeover reports. uber. I love recon. ValluvarSploit Security ValluvarSploit Security #bugbountytips #bugbountytip #bugbounty… Aaj ki iss video mein maine aapse baat ki hai subdomain takeover vulnerability ke baare mein step by step guide kiya hai jaha mein aapko shikaunga ki kaise subdomain takeover hota hai. com -o subdomains. firefox. It helps you find vulnerabilities in your applications, APIs, networks, DNS, and cloud Jul 8, 2017 · Snapchat had this Fastly instance set up, but eventually cancelled their service. 1. The fundamentals seemed clear: identify a Jul 18, 2023 · Fastly Subdomain Takeover $2000 Bug Bounty — From zero to HERO — WHOAMI My name is Alexandar Thangavel AKA ValluvarSploit, a full-time bug hunter and trainer. Routing traffic to Fastly requires that the hostname requested by the end user resolves to a Fastly IP address, and that Fastly is able to serve a TLS certificate that is valid for that hostname. net** will CNAME resolve to **addons. The Jul 17, 2023 · Fastly Subdomain Takeover $2000 Bug Bounty — From zero to HERO — WHOAMI My name is Alexandar Thangavel AKA ValluvarSploit, a full-time bug hunter and trainer. Contribute to umutcamliyurt/Subhunter development by creating an account on GitHub. Subdomain Takeover Vulnerability | STEP BY STEP TUTORIAL Part 01 | tcrsecurity In this video, we dive deep into the world of Subdomain Takeover, a critical vulnerability that bug bounty hunters A fast subdomain takeover tool. I am the Feb 10, 2024 · Fastly Subdomain Takeover $2000 Bug Bounty — From zero to HERO by Alexandar Thangavel AKA ValluvarSploit WHOAMI My name is … I just published Fastly Subdomain Takeover $2000 writeup. This allows an attacker to set up a page on the service that was being used and point their page to that subdomain. We'll be back online shortly. Fastly Subdomain Takeover $2000Did you know . The day started as usual. A subdomain takeover was not possible because although there was no service configured, we do have control of any subdomain of rubygems. Subdosec is a fast, accurate subdomain takeover scanner with no false positives. Security researcher martinvw earned a $500 bounty from Mozilla by identifying and successfully proving a subdomain takeover vulnerability on live. in/dtbKbZ_A #infosec #cybersecurity #redteam #pentest #pentesting #hacking #hackers #coding… Nov 4, 2022 · Subdomain Takeover (SDTO) attacks are popular for their ease of exploitation and inherent severity. This happens when a subdomain, which should point to a specific web service (like a hosting platform, cloud service, or CDN), ends up pointing to a service that’s been decommissioned or abandoned, while the DNS record still exists. Since … Hey team, I've found a snapchat cdn domain here which had a test instance of fastly setup but did not remove the dns record when the service was cancelled. Fastly Subdomain Takeover $2000#NFLKickoff is here and we’re starting the season with a live chat about how Cisco connects and protects the NFL. 9. How can you identify it? Subdover is a MultiThreaded Subdomain Takeover Vulnerability Scanner Written In Python3, Which has more than 88+ Fingerprints of potentially vulnerable services. This article delves into a real-world scenario involving the Company’s infrastructure, unraveling the intricacies of subdomain takeovers within Azure Traffic Manager. txt ; nuclei -t ~/. Fair use is a use permitted by copyright statutes that might otherwise be infringing. com 113 6 Comments ValluvarSploit Security reposted this Alexandar T Bug Bounty Hunter, Trainer and Mentor (#ReadyToWork) 1y Fastly Subdomain Takeover $2000 https://ow. Regularly Audit DNS Records You don’t want a situation where your developer team spins up a temporary subdomain for testing and then forgets about Fastly Subdomain Takeover worth $2000 by ValluvarSploit Security https://lnkd. . 📘 Can I Take Over XYZ → List of vulnerable services. Contribute to 0xvendeta/Subdomain_Takeover_PoC development by creating an account on GitHub. in/dtbKbZ_A #infosec #cybersecurity #redteam #pentest #pentesting #hacking #hackers #coding Subdomain takeover vulnerability checker. Jun 26, 2021 · In this video, I am going to show you how you can install NtHiM on Kali Linux using cargo. 101. Tools: Subfinder subfinder -d example. It's like someone sneaking into your backyard and setting up camp without your knowledge! Do you know how to make a PoC after finding a subdomain takeover in a AWS service? In this post I’ll share some insights and tips along with how to create a nice proof of concept so that our bugs get accepted and paid! I just published Fastly Subdomain Takeover $2000 writeup. Subdomain Takeover poc for which researcher got 500$ #bugbounty #writeup #bugbountytips . The root cause? A CNAME pointing to Fastly without a Aug 15, 2018 · @EdOverflow’s Guide To Subdomain Takeovers HackerOne’s Hacktivity feed — a curated feed of publicly-disclosed reports — has seen its fair share of subdomain takeover reports. Jun 15, 2025 · Introduction The threat of subdomain takeover has traditionally been linked to dangling CNAME records — forgotten pointers to services no longer in use. It supports multiple cloud providers and services, making it essential for comprehensive security assessments of modern web applications and cloud infrastructure. txt | httpx -silent > subdomains. We would like to show you a description here but the site won’t allow us. When an asset, usually a subdomain, points to a third-party hosting provider via CNAME dns record, it will fetch content Feb 10, 2024 · Fastly Subdomain Takeover $2000 Bug Bounty — From zero to HERO by Alexandar Thangavel AKA ValluvarSploit WHOAMI My name is … Fastly Subdomain Takeover $2000 link. ValluvarSploit Security ValluvarSploit Security #bugbountytips #bugbountytip #bugbounty… Top Subdomain Takeover reports from HackerOne: Subdomain Takeover to Authentication bypass to Roblox - 769 upvotes, $0 Subdomain takeover of datacafe-cert. Always double check the results manually to rule out false positives. e. Nuclei is a fast, customizable vulnerability scanner powered by the global security community and built on a simple YAML-based DSL, enabling collaboration to tackle trending vulnerabilities on the internet. GitHub pages, Heroku, etc. in/dtbKbZ_A #infosec #cybersecurity #redteam #pentest #pentesting #hacking #hackers #coding Some helper tools to validate subdomain takeovers. Built-in Subdomain Enumeration Feature & Auto HTTP prober [Uses Open Source Tool for Subdomain Enum & HTTP probing i. The fundamentals seemed clear: identify a May 11, 2020 · We’ve encountered many Fastly pages and couldn’t succeed in hijacking it. Dec 15, 2023 · Introduction: In the dynamic world of cybersecurity, where vulnerabilities lurk in unexpected corners, the concept of subdomain takeovers has become a compelling arena for exploration. (NYSE: FSLY), a leader in global edge cloud platforms, today announced a new update to Fastly Bot Management, delivering three key features that help organizations defend against scraping, account takeovers, and spam. What is a subdomain takeover? Subdomain takeover vulnerabilities occur when a subdomain (subdomain. Let’s review 12 practical strategies for protecting your infrastructure. Thanks for your patience and support. Apr 25, 2024 · subjack This package contains a Subdomain Takeover tool written in Go designed to scan a list of subdomains concurrently and identify ones that are able to be hijacked. Jul 4, 2025 · When a domain as recognizable as firefox. With Go’s speed and efficiency, this tool really stands out when it comes to mass-testing. com). This article Sep 22, 2025 · Fast and efficient subdomain takeover vulnerability scanner written in Rust. DNS is designed to allow delegation, or permit a large organization to split up their DNS into subdomains for management reasons. mozilla. Hello Hackers, I’m Nishan Faiyaz, also known in the hacking community as … Oct 7, 2025 · In this write-up I am going to tell you guys how I was able to perform a subdomain takeover and receive a 4-digit $$ bounty reward. brave. Bug bounty reports often require proof-of-concept. Cisco SVP and Chief Marketing Officer Carrie Fastly Subdomain Takeover $2000Read how Alexander found his 2000$ Bug! My name is Alexandar Thangavel AKA ValluvarSploit, a full-time bug hunter and trainer. com has a dangling subdomain, it’s not just a technical misstep—it’s an open door for phishing, malware delivery, and trust abuse. Dec 31, 2023 · My first bounty Ever from bug hunting worth $100 (Subdomain takeover) Hello My first bug hunting bounty was $100 from a hackerone program name Fanduel This is low bounty and closed as informative … Jul 12, 2018 · add subdomain or domain if accept to add your domain this mean you can takeover it then do the next steps. com to Uber - 180 upvotes, $0 Subdomain takeover of storybook. The Apr 25, 2023 · Subdomain takeover is a serious security risk that can leave your website vulnerable to attacks. Understanding the concept of subdomain takeovers involves exploring the normal operations of subdomains, the concept of dangling DNS, and the potential consequences of a successful takeover. domain. Domain 'sc-cdn. ) that has been removed or deleted. Sep 18, 2025 · In short, Fastly enforces a domain-level protection mechanism where ownership of the main domain prevents attackers from claiming related subdomains, which is why most Fastly based What is a subdomain takeover? Subdomain takeover vulnerabilities occur when a subdomain (subdomain. It includes a variety of templates for identifying vulnerabilities in web applications, including takeover templates that can be used to identify subdomain takeover vulnerabilities. then in the Origin Host add Your VPS ip without ssl if not include port 80. Discover smart, unique perspectives on Subdomain Takeover and the topics that matter most to you like Bug Bounty, Cybersecurity, Hacking, Bug Although I have written multiple [/subdomain-takeover-starbucks/] posts [/takeover-proofs/] about subdomain takeover, I realized that there aren't many posts covering basics of subdomain takeover and the whole "problem statement. However, that expired subdomain is still a part of the organization's external attack surface, with domain DNS entries pointing to it. global. lystit. Sep 25, 2024 · Learn the ins and outs of understanding subdomain configurations with current resources and tools from an expert security researcher. Jump into this article to understand subdomain takeovers and how to avoid them. Step 5: Confirming Takeover Feasibility To ensure the subdomain is truly vulnerable, I accessed example. Dec 4, 2017 · How I started a chain of subdomain takeovers and hacked 100’s of companies It all started six months back when i found Frans Rosén’s blog … Nov 3, 2025 · A technical summary of my responsible disclosure work on a high impact subdomain takeover vulnerability I discovered. Subdomain Takeover. " This post aims to explain (in-depth) the entire subdomain takeover problem once again, along with results of an Internet-wide scan that I performed back in 2017 Routing traffic to Fastly Fastly's global edge network is the first stop for users making requests to your website. com 110 1 Comment 9,135 followers 1,613 Posts Top disclosed reports from HackerOne. If an attacker were to register the non existing domain then the target subdomain would now point to your domain effectively giving you full control over the target’s subdomain. We removed the record because it was not needed any longer. Fastly Subdomain Takeover $2000 https://lnkd. com to Starbucks - 308 upvotes, $0 Authentication bypass on auth. Subhunter A fast subdomain takeover tool Description: Subdomain takeover is a common vulnerability that allows an attacker to gain control over a subdomain of a target domain and redirect users intended for an organization's domain to a website that performs malicious activities, such as phishing campaigns, stealing user cookies, etc. Contribute to PentestPad/subzy development by creating an account on GitHub. But in today’s SaaS-powered world, the attack surface has evolved. This can lead to malicious activities such as phishing, malware distribution, and defacement. But as mentioned by d0xing “most are not vulnerable because they’ve claimed their root domain, but if you setup fastly with a subdomain only and release it, it is vulnerable to takeover” We used a DigitalOcean VPS which gave us good speed and bandwidth. in/dtbKbZ_A #infosec #cybersecurity #redteam #pentest #pentesting #hacking #hackers #coding Fastly Subdomain Takeover $2000#NFLKickoff is here and we’re starting the season with a live chat about how Cisco connects and protects the NFL. com. com in a browser 🛠️ GitHub Tools for Subdomain Takeover 🔎 Subjack → Detect subdomain takeover vulnerabilities. I am the founder and CEO PenTest Magazine 18,011 followers 7h [FREE ACCESS ARTICLE] Fastly Subdomain Takeover $2000 https://lnkd. Step 1: Subdomain Enumeration Start by gathering all subdomains for the target domain. By familiarizing Aug 23, 2024 · Subdomain Takeover is a vulnerability that’s been covered quite extensively, especially in the bug bounty space, but I still see a lot of security professionals getting mixed up about how this happens and the potential impact of a takeover. Jan 3, 2024 · A subdomain is not synonymous with a root domain. com 108 1 Comment 6,450 followers 335 Posts 1y Fastly Subdomain Takeover worth $2000 by ValluvarSploit Security https://lnkd. medium. Because of this, it doesn't look like you can do takeovers anymore. starbucks. This often leads to companies losing their trust over the users and various other implications, due to loss of millions of dollars when a successful subdomain takeover is maliciously executed and an attacker puts up a successful phishing campaign. This was started on October 2nd, 2022 Sunday. This can lead to phishing, malware distribution, defacement, or other malicious activities. One Subdomain Takeover occurs when a third party seizes control of a subdomain, exploiting it for malicious deeds. in/dtbKbZ_A #infosec #cybersecurity #redteam #pentest #pentesting #hacking #hackers #coding #opensource Feb 7, 2024 · A subdomain takeover occurs when a subdomain is pointing to another domain (CNAME) that no longer exists. - jakejarvis/subtake Fastly Subdomain Takeover $2000 https://lnkd. I am the founder and CEO Fastly Subdomain Takeover $2000 WHOAMI My name is Alexandar Thangavel AKA ValluvarSploit, a full-time bug hunter and trainer. Aug 2, 2025 · “i found the subdomain of webflow that would be takeover by i don't have webflow subscription to check it does anybody can help ?” is published by Aftabsaifi. May 23, 2023 · Nuclei is an open-source project that provides a framework for fast and customizable vulnerability scanning. org**, which resolves within Fastly's service. 🛡️ Nuclei Templates → Ready-to-use detection scripts. A subdomain takeover occurs when an attacker gains control of a subdomain of a legitimate website. Read stories about Subdomain Takeover on Medium. Essentially they take advantage of forgotten, uncommitted or mismanaged CNAME records that point from a victim domain or subdomain to another domain or subdomain which has expired and become available, or the service once located there has lapsed and been deactivated by a service provider that I recently found an abandoned and/or overlooked nodejs. com 151. allizom. However, they had forgotten to remove the DNS record, which allowed this researcher to simply to register a new Fastly instance with this name. Let’s get started. Related searches bug bounty bug bounty writeups bug bounty for beginners bug Mar 25, 2025 · Latest Fastly Bot Management update reduces CAPTCHA reliance, enhances bot detection, and highlights compromised credentials Fastly, Inc. example. ## Summary: Hey! I want to inform you about sub domain takeover issue i. Oct 7, 2025 · In this write-up I am going to tell you guys how I was able to perform a subdomain takeover and receive a 4-digit $$ bounty reward. Subdomain takeover is a type of vulnerability where an attacker can take control of a subdomain that is pointing to an external service that is no longer in use or misconfigured. org subdomain that was indirectly pointing to Fastly. This allowed me to create a Fastly instance to take it over.