security-scan
Scan your Claude Code configuration (.claude/ directory) for security vulnerabilities, misconfigurations, and injection risks using AgentShield. Checks CLAUDE.md, settings.json, MCP servers, hooks, and agent definitions.
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Critical
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tessl review fix ./skills/security-scan/SKILL.mdSecurity
2 findings — 1 critical severity, 1 medium severity. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E005: Suspicious download URL detected in skill instructions
What this means
Detected a suspicious URL in the skill instructions that could lead the agent to download and execute malicious scripts or binaries. This includes links to executables from untrusted sources, typosquatting of official packages, URL shorteners that obscure the destination, and personal file hosting services.
Why it was flagged
Suspicious download URL detected (high risk: 0.70). Both URLs point to a third‑party npm package and a personal GitHub repo (affaan‑m/agentshield) that are unverified sources for an executable npm package run via npx, which presents a supply‑chain/malware risk unless you trust the author and have audited the code.
W012: Unverifiable external dependency detected (runtime URL that controls agent)
What this means
The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.
Why it was flagged
Potentially malicious external URL detected (high risk: 0.80). The skill requires running npx/npm and a GitHub Action which fetch and execute remote code (e.g., the referenced AgentShield package at https://github.com/affaan-m/agentshield and https://www.npmjs.com/package/ecc-agentshield), so these runtime dependencies can execute external code.
- Repository
- affaan-m/ECC
- Commit
754b8dd
- Audited
- Security analysis
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