To the Brut Security Community: Saraswati Puja is a celebration of learning, and in our field, learning never stops. May your curiosity be endless, your logic be sharp, and your thirst for knowledge lead you to mastery.

Wishing you a powerful and blessed Saraswati Puja. Let’s keep building, keep breaking, and keep learning.

♾Bug Bounty Tip: Bypassing WAFs for Stored XSS via ASCII-Hex Encoded PDF Payloads

➡️Many platforms allow users to upload PDFs that get previewed/rendered directly in the browser (often using libraries like PDF.js in Firefox, Chrome extensions, embedded viewers, or custom implementations).

A clever trick for Stored XSS (or Blind XSS variants):

1. Craft a classic XSS payload (e.g., one that executes alert(document.domain) or exfiltrates cookies/tokens).

2. Encode the entire malicious JavaScript as ASCII hex (each character → \xHH format).

3. Embed it inside a tiny/valid PDF structure that triggers execution during font/glyph rendering or object parsing in vulnerable PDF renderers.

4. Upload the PDF to a target feature that stores and previews user-uploaded documents (profile, reports, tickets, resumes, invoices, shared files, etc.).

5. When a victim (admin, user, or support) previews/opens the PDF in a vulnerable renderer → XSS fires in the context of the PDF viewer.

⚡️Key advantages:
- Many WAFs / upload filters / content scanners completely miss it because it's not a classic <script> or HTML — it's binary-ish PDF content with hex-encoded JS.

- Can be tuned for Stored → persistent until deleted.

- Can be adapted for Blind XSS → exfiltrate to your server instead of alert().

💬Real-world notes from hunters:
- Works especially well against PDF.js-based previews (Firefox default, many web apps embed it).

- Reference: Similar to behavior seen in CVE-2024-4367 (arbitrary JS exec in PDF.js via font handling path).

- Impact varies:

- Self-XSS / low-priv user alert → usually P4–P5 or Informational.

- Admin views it → potential session theft / higher severity (P2–P3 possible if you can prove escalation).

- Some programs reject pure alert() PoCs in sandboxed viewers (no cookie access in most cases) → demonstrate real impact (e.g., redirect, keylogger, token exfil) or target-specific quirks.

- Pro tip: Test on your primary programs that have PDF preview/generation features — many still do!

⚡️Resources to start:
- Repo with example payloads: https://github.com/orwagodfather/XSS-Payloads
- Edit payloads easily in Notepad++ (hex view or find/replace).

Happy hunting — stay ethical & report responsibly! 🏆

Photo Credit- Orwa

#bugbountytip #bugbounty #xss #websecurity #pdfxss

Tips for Testing Account Takeover Vulnerabilities.

Guys, this is DarkShadow.
This is absolutely crazy—you won’t believe this!

A researcher recently discovered a vulnerability where anyone can view posts from a private Instagram account. The most shocking part? It’s super simple.
When you visit a private Instagram profile, the account still appears private to normal users. However, if you inspect the response/source code, all the posts are actually visible there😳

I highly recommend everyone check out the YouTube POC video explaining this issue in detail:
https://youtu.be/VTVdrvAJ28E?si=7Eu1h1iHioGyYOlC

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You don't need certs
to be successful in
bug bounty
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Hey Hunter's,
DarkShadow here back again, dropping a RCE in mail input field!

Listen, this is very important.

1. When a sign-in/sign-up page comes, use a normal email using your burp collaborator.
2. If you got any HTTP hit back in your burp, then don't stop thinking by SSRF.
3. Now test command injection payload on the mail input field.
4. Don't use URL encoding in space like %20 always use ${IFS} to replace spaces.
5. It's essential when you try here RCE also try blind OS injection payloads.

I Hope this method also help you to improve your bug hunting. Now guys show your love ❤️

#bugbountytip #rce

⚡Flowsint - Flowsint is an open-source OSINT graph exploration tool designed for ethical investigation, transparency, and verification.

✅https://github.com/reconurge/flowsint