Individual skill
testing-mcp-server-security
Testing Model Context Protocol (MCP) servers and the clients that consume them for tool poisoning, prompt injection via tool descriptions/outputs, over-permissioned and local-credential-stealing tools, config/trust bypasses, and unauthenticated RCE during authorized penetration tests of AI agent infrastructure.
internal/tools/skills/data/ai-security/testing-mcp-server-security/SKILL.md
Source commit d42f381ad34843e71a42658e5c57290c713e85af
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- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 9, 2026
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Repository context
- Repository stars (not skill ratings)
- 1,320
- Repository last updated
- Nov 8, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- cybersecurity Repository topic
- security Repository topic
- bug-bounty Repository topic
- automation Repository topic
- autonomous-pentesting Repository topic
- ai-agent Repository topic
- ai-security Repository topic
- ethical-hacking Repository topic
- golang Repository topic
- penetration-testing Repository topic
- ai-security Declared skill tag
- mcp-security Declared skill tag
- penetration-testing Declared skill tag
- devops Derived category
- security Derived category
- testing Derived category
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# Testing MCP Server Security
## When to Use
- During authorized assessments of AI agents/IDEs (Cursor, Claude Code/Desktop, Flowise) that load MCP servers
- When reviewing third-party or marketplace MCP servers/skills before or after deployment
- When an MCP server runs locally over `stdio` and inherits the user's OS credentials
- When testing whether tool descriptions, schemas, or outputs can inject instructions into the model
- When assessing MCP config trust, update/supply-chain risk, and transport-layer auth gaps
## Prerequisites
- **Authorization**: Written agreement covering the MCP servers, clients, and host workstations in scope
- **Python + `mcp` SDK** (`pip3 install mcp "mcp[cli]"`): to build test servers and run `mcp dev` inspector