VulnForge: Probably One of the Hardest Damn Local Web Apps To Fully Crack
Source: Dev.to
Spoiler Warning
This post explains the general difficulty and vulnerability count inside VulnForge.
It does not reveal exact exploit chains, payloads, or step‑by‑step solutions.
- If you want to discover everything yourself, stop reading after the intro.
- If you want the full walkthroughs, email me privately at:
Overview
VulnForge is a deliberately hardened local web application designed to “fight back” rather than collapse after a single injection payload. It looks clean on the surface, but the deeper you go into the code, the more you realize it’s wired to break every rule possible—in a layered, modern, realistic way.
People often expect vulnerable apps to be easy. VulnForge is the opposite. It requires real enumeration, chaining, and analysis. If you’re looking for a one‑sitting puzzle, this isn’t it.
GitHub repository:
When I say this thing is loaded, I mean it. The codebase contains more than thirty separate vulnerabilities spread across every major category.
Vulnerability Summary
Authentication and Session Management (8 flaws)
- Weak session secrets
- Session fixation
- JWT hard‑coded keys
- Username enumeration through timing
- No rate limiting
- Insecure cookies
- Predictable session tokens
- No lockout logic
Injection Vulnerabilities (6 flaws)
- SQL injection
- NoSQL injection potential
- Command injection in debug routes
- LDAP injection
- XPath injection
- Server‑side template injection
Access Control Issues (5 flaws)
- IDOR everywhere
- Privilege escalation
- Missing authorization checks
- Path traversal
- Leaked admin functions
Cross‑Site Scripting (4 flaws)
- Stored XSS in messaging
- Reflected XSS
- DOM‑based XSS
- Upload‑based XSS
File Upload Vulnerabilities (3 flaws)
- Unrestricted uploads
- Upload traversal
- Executable bypass
API Security Issues (4 flaws)
- Missing API authentication
- Key exposure
- Rate‑limit bypass
- Sensitive data leakage
WebSocket Vulnerabilities (2 flaws)
- Auth bypass
- Admin command execution
Configuration Issues (3 flaws)
- Debug routes enabled
- Sensitive info disclosure
- Environment variable exposure
Additional problems include CSRF, XXE possibilities, insecure redirects, broken logging, weak cryptographic choices, and more.
You won’t solve this app by accident. It demands thorough enumeration, deep digging into internal services, analysis of proxy behavior, and chaining of issues.
If you want the full exploit chains, real attack paths, and private write‑ups, email me at:
If you’re looking for a challenge that actually makes you think, give VulnForge a try—it’s one of the hardest local web apps you’ll ever try to fully crack.