Guide for setup Serena MCP server for semantic code retrieval and editing capabilities
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Low-risk findings worth noting
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tessl review fix ./plugins/mcp/skills/setup-serena-mcp/SKILL.mdLow
Low-risk findings.
2 low severity findings. Worth noting, but not necessarily harmful.
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
The skill explicitly instructs the agent to load and read public third‑party documentation from raw.githubusercontent.com and oraios.github.io (see Step 3 "Load Serena documentation"), and then requires the agent to base setup, configuration, and runtime actions on that content, so untrusted external pages can materially influence behavior.
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.
The skill explicitly instructs the agent at runtime to load external Serena documentation (e.g., https://raw.githubusercontent.com/oraios/serena/refs/heads/main/README.md and https://oraios.github.io/serena/02-usage/020_running.html, etc.), and that fetched content is then used to generate/drive the setup instructions, so these URLs are runtime external dependencies that directly control agent behavior.
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