Agent skill

server-side

Server-side vulnerability testing - SSRF, HTTP Request Smuggling, Path Traversal, File Upload, Insecure Deserialization, and Host Header injection.

View SKILL.md on GitHub Repository
Stars 129
Forks 20

Install this agent skill to your Project

npx add-skill https://github.com/transilienceai/communitytools/tree/main/projects/pentest/.claude/skills/server-side

SKILL.md

Server-Side

Test for server-side vulnerabilities that allow unauthorized access, RCE, or data exfiltration.

Techniques

Type Key Vectors
SSRF Internal service access, cloud metadata, protocol smuggling
HTTP Smuggling CL.TE, TE.CL, TE.TE, CL.0, H2.CL, h2c, multi-layer proxy chains, connection pooling desync
Path Traversal Directory traversal, null bytes, encoding bypass
File Upload Extension bypass, content-type manipulation, polyglot files
Deserialization Java, PHP, Python, .NET gadget chains
Host Header Password reset poisoning, cache poisoning, routing-based SSRF

Workflow

  1. Identify server-side processing points
  2. Test for vulnerability class indicators
  3. Bypass protections (WAF, allowlists, encoding filters)
  4. Demonstrate impact (file read, RCE, internal access)
  5. Capture evidence with PoC

Reference

  • reference/ssrf*.md - SSRF techniques and labs
  • reference/http-request-smuggling*.md - Smuggling techniques
  • reference/path-traversal*.md - Path traversal bypass methods
  • reference/file-upload*.md - File upload exploitation
  • reference/insecure-deserialization*.md - Deserialization attacks
  • reference/http-host-header*.md - Host header injection

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