memstack-security-owasp-top10

memstack-security-owasp-top10 is a skill for Claude Code from cwinvestments/memstack. It costs 69 tokens per session (4,792 once invoked), scanned A, original, MIT.

A web application security review checks an app against the OWASP Top 10, a widely used list of major web security risks.

In plain words
What is it for?
Use it for a quick or deep pre-launch review, vulnerability assessment, security audit, or compliance check with remediation guidance.
Why use it?
It helps uncover vulnerabilities across the whole application instead of focusing only on packages, secrets, or one narrow area.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the memstack plugin — 87 skills, 2 commands, 6 hooks shipped together

Good fit Use it for a quick or deep pre-launch review, vulnerability assessment, security audit, or compliance check with remediation guidance.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cwinvestments/memstack/owasp-top10
Install

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.

Any agent
npx skills add cwinvestments/memstack --skill owasp-top10
Clone the repo
git clone --depth 1 https://github.com/cwinvestments/memstack

Made for: Claude Code.

Or install memstack, the plugin that ships this one along with the rest of its 87 skills, 2 commands, 6 hooks.

Wrote 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.

agentmods badge for memstack-security-owasp-top10

README.md
[![agentmods](https://agentmods.dev/badge/skills/cwinvestments/memstack/owasp-top10/github.svg)](https://agentmods.dev/skills/cwinvestments/memstack/owasp-top10)
Your own site
<a href="https://agentmods.dev/skills/cwinvestments/memstack/owasp-top10"><img src="https://agentmods.dev/badge/skills/cwinvestments/memstack/owasp-top10/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.

agentmods 80×15 button for memstack-security-owasp-top10

Your own site · 80×15
<a href="https://agentmods.dev/skills/cwinvestments/memstack/owasp-top10"><img src="https://agentmods.dev/badge/skills/cwinvestments/memstack/owasp-top10.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,792 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 2 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Memory Poisoning · line 111
    Skill manipulates agent memory, state, or stored context. Memory corruption can alter personality, override safety rules, or cause unpredictable behavior.
    Fix: Protect agent memory and state from modification by untrusted content. Use read-only memory for critical instructions and validate all state changes.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00069 $0.04792
Opus 5 $0.00034 $0.02396
Sonnet 5 $0.00014 $0.00958
Haiku 4.5 $0.00007 $0.00479

Measured 7d ago against content hash e3de86e80759, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

memstack-security-owasp-top10 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 7d 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.

Search for `fetch(`, `axios.get`, `axios.post`, `got(`, `request(` calls. For each, check if the URL comes from user input (query params, request body, database).

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

Search for shell execution imports (`child_process`) and calls (`execSync`, `spawn`). Verify user input is never passed to shell commands. Use `execFile` with argument arrays instead.
skills/security/owasp-top10/SKILL.md · 445 lines

How it starts

The opening of the file, as written. The whole thing — 445 lines — stays where its author put it; the contents beside it link to each section on GitHub.

🛡️ OWASP Top 10: Running Full Vulnerability Assessment...

Audit a web application against the OWASP Top 10 (2021) vulnerability categories with actionable findings and remediation.

Activation

When this skill activates, output:

🛡️ OWASP Top 10: Running Full Vulnerability Assessment...

Then execute the protocol below.

Context Guard

Context Status
User asks for OWASP/security audit ACTIVE: full assessment
User asks for vulnerability check ACTIVE: full assessment
Pre-launch security review ACTIVE: full assessment
User asks about a specific OWASP category ACTIVE, targeted check for that category
User is actively fixing a vulnerability DORMANT: let them work

Scan Modes

This skill supports two modes. Default to deep scan unless the user specifies otherwise.

Mode Scope When to use
Quick scan A01 (auth), A05 (headers + config), A06 (deps) Fast pre-deploy check, CI pipeline gate, or first-pass triage
Deep scan All 10 categories Pre-launch review, security audit, compliance check

If the user says "quick OWASP", "quick security check", or "fast scan", run only A01 + A05 + A06 and output the scorecard with the other 7 categories marked as "⏭️ SKIPPED (quick mode)".

Protocol

Run each of the 10 checks below (or A01 + A05 + A06 only in quick mode). For each, search the codebase for vulnerability patterns, classify findings, and record results for the final scorecard.

Finding format: Every finding MUST include a file path and line number in the format file:line. If a finding is project-wide (e.g., "no rate limiting anywhere"), reference the most relevant file where the fix would be applied. Vague findings like "missing HSTS" without pointing to the middleware or config file are not actionable.


A01: Broken Access Control

Risk: Users acting beyond their intended permissions: accessing other users' data, elevating privileges, or bypassing access restrictions.

Read the full file on GitHub · 445 lines

Changes

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.

  1. 7d ago Changed e3de86e80759
  2. 8d ago First seen · 445 lines · 69 tokens per session scan A db8ac3bff1a1

Subscribe to this mod's changes

memstack-security-owasp-top10 is a skill published in the GitHub repository cwinvestments/memstack (419 stars, last pushed 3d ago), licensed MIT. It adds 69 tokens to every session and 4,792 once invoked, about $0.0003 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 2026-09-03.

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