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testing-api-for-mass-assignment-vulnerability

97 / 100 · Low risk

Fine to try.

By plurigrid/asi (GitHub) · coding · 72 stars · scanned at commit 293ce9f

Tests APIs for mass assignment (auto-binding) vulnerabilities where clients can modify object properties they should not have access to by including additional parameters in API requests. The tester identifies writable endpoints, adds undocumented fields to request bodies (role, isAdmin, price, balance), and checks if the server binds these to the data model without filtering. Part of OWASP API3:2023 Broken Object Property Level Authorization. Activates for requests involving mass assignment te…

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'testing-api-for-mass-assignment-vulnerability' ] || [ -L ~/.agents/skills/'testing-api-for-mass-assignment-vulnerability' ]; then echo 'A skill folder named testing-api-for-mass-assignment-vulnerability already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/plurigrid/asi' "$d" && git -C "$d" checkout --quiet '293ce9f76e3abcd5ba18db284688bc0d9ac6691d' -- 'plugins/asi/skills/testing-api-for-mass-assignment-vulnerability' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/asi/skills/testing-api-for-mass-assignment-vulnerability' ~/.agents/skills/'testing-api-for-mass-assignment-vulnerability' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'testing-api-for-mass-assignment-vulnerability' ~/.claude/skills/'testing-api-for-mass-assignment-vulnerability' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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