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 skills add smk-labs/claude-plugins --skill owasp-securitygit clone --depth 1 https://github.com/smk-labs/claude-pluginsWrote 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/smk-labs/claude-plugins/owasp-security)<a href="https://agentmods.dev/skills/smk-labs/claude-plugins/owasp-security"><img src="https://agentmods.dev/badge/skills/smk-labs/claude-plugins/owasp-security.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 5.1 | $0.00114 | $0.01760 |
| Opus 5 | $0.00057 | $0.00880 |
| Sonnet 5 | $0.00023 | $0.00352 |
| Haiku 4.5 | $0.00011 | $0.00176 |
Grade A, and why
owasp-security scanned grade A with 2 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 6d 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.
6. **Standard Library:** Historic CVEs in std libs (Python urllib, Java XML, Ruby OpenSSL). Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
os.system(f"convert {filename} output.png") How it starts
The opening of the file, as written. The whole thing — 196 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OWASP Security Best Practices
Apply these security standards when writing or reviewing code.
For deeper material, load on demand:
- references/language-security-quirks.md: language-specific pitfalls and unsafe/safe patterns for 20 languages (JS/TS, Python, Java, C#, PHP, Go, Ruby, Rust, Swift, Kotlin, C/C++, Scala, R, Perl, Bash, Lua, Elixir, Dart, PowerShell, SQL). Read it when reviewing code in a specific language.
- references/llm-agentic-security.md: OWASP Top 10 for LLM Applications (2025) and Agentic AI security (2026), with checklists and code patterns. Read it when the code calls an LLM, builds a RAG pipeline, or wires up an AI agent with tools.
Quick Reference: OWASP Top 10:2025
| # | Vulnerability | Key Prevention |
|---|---|---|
| A01 | Broken Access Control | Deny by default, enforce server-side, verify ownership |
| A02 | Security Misconfiguration | Harden configs, disable defaults, minimize features |
| A03 | Supply Chain Failures | Lock versions, verify integrity, audit dependencies |
| A04 | Cryptographic Failures | TLS 1.2+, AES-256-GCM, Argon2/bcrypt for passwords |
| A05 | Injection | Parameterized queries, input validation, safe APIs |
| A06 | Insecure Design | Threat model, rate limit, design security controls |
| A07 | Auth Failures | MFA, check breached passwords, secure sessions |
| A08 | Integrity Failures | Sign packages, SRI for CDN, safe serialization |
| A09 | Logging Failures | Log security events, structured format, alerting |
| A10 | Exception Handling | Fail-closed, hide internals, log with context |
Security Code Review Checklist
When reviewing code, check for these issues:
Input Handling
- All user input validated server-side
- Using parameterized queries (not string concatenation)
- Input length limits enforced
- Allowlist validation preferred over denylist
Authentication & Sessions
- Passwords hashed with Argon2/bcrypt (not MD5/SHA1)
- Session tokens have sufficient entropy (128+ bits)
- Sessions invalidated on logout
- MFA available for sensitive operations
What ships with it
2 files 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.
- 6d ago First seen · 196 lines · 114 tokens per session scan A 3674820f65ba
owasp-security is a skill published in the GitHub repository smk-labs/claude-plugins (11 stars, last pushed yesterday), licensed MIT. It adds 114 tokens to every session and 1,760 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 2 findings (makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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