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performing-web-cache-poisoning-attack
92 / 100 · Low risk
Fine to try. Some of what it can do is expected: a security skill usually runs scanners and checks websites.
By plurigrid/asi (GitHub) · security · 72 stars · scanned at commit 293ce9f
Exploiting web cache mechanisms to serve malicious content to other users by poisoning cached responses through unkeyed headers and parameters during authorized security tests.
Works with any agent that supports SKILL.md skills.
What this skill can do
Sends data to these websites: target.example.com
This is disclosed by the author in the skill's SKILL.md or README. Expected for a security skill.
Found in 25 places.
Show 17 more
- plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 61
curl -s -I "https://target.example.com/" | grep -i "vary" - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 90
curl -s -H "X-Forwarded-Host: evil.example.com" \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 94
curl -s -H "X-Forwarded-Scheme: nothttps" \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 98
curl -s -H "X-Original-URL: /admin" \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 102
curl -s -H "X-Forwarded-Proto: http" \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 116
curl -s -H "X-Forwarded-Host: evil.example.com" \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 122
curl -s -H "X-Forwarded-Host: evil.example.com" \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 126
curl -s "https://target.example.com/" | grep "evil.example.com" - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 130
curl -s -H "X-Forwarded-Proto: http" \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 135
curl -s \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 156
curl -s -H "Authorization: Bearer $VICTIM_TOKEN" \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 161
curl -s "https://target.example.com/account/profile/test.css" - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 167
curl -s -H "Authorization: Bearer $TOKEN" \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 186
curl -s "https://target.example.com/?utm_content=<script>alert(1)</script>&cb=$(date +%s)" | \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 191
curl -s "https://target.example.com/jsonp?callback=alert(1)&cb=$(date +%s)" - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 194
curl -s -X GET \ - plugins/asi/skills/performing-web-cache-poisoning-attack/SKILL.md, line 201
curl -s "https://target.example.com/page?a=1&b=2" # Cached as key1
and 5 more places
Runs commands on your computer
The author does not mention this. Expected for a security skill.
Found in 6 places.
Show 3 more
Install
Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.
if [ -e ~/.agents/skills/'performing-web-cache-poisoning-attack' ] || [ -L ~/.agents/skills/'performing-web-cache-poisoning-attack' ]; then echo 'A skill folder named performing-web-cache-poisoning-attack already exists — not replacing it' >&2; false; else d=$(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/performing-web-cache-poisoning-attack' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/asi/skills/performing-web-cache-poisoning-attack' ~/.agents/skills/'performing-web-cache-poisoning-attack' && rm -rf "$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/'performing-web-cache-poisoning-attack' ~/.claude/skills/'performing-web-cache-poisoning-attack' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.
Badge for your README
The badge for plurigrid/asi shows the score of its lowest-scoring skill.

[](https://zalavijaysinh.github.io/skilltrust/repos/plurigrid/asi/)
Score history
| Date | Version | Score |
|---|
| 2026-11-07 | 293ce9f | 92 |