Skills security-and-hardening
๐Ÿ“ฆ

security-and-hardening

Content revision r2 Safe โšก Contains scriptsโš™๏ธ External commands๐ŸŒ Network access๐Ÿ“ Filesystem access๐Ÿ”‘ Env variables

Harden Applications Against Security Risks

Security reviews can miss trust boundaries and unsafe data flows. This skill supplies threat-modeling prompts, OWASP patterns, and practical review checklists.

Supports: Claude Codex Code(CC)
๐Ÿฅ‰ 78 Bronze

Install with my Agent

Copy this request to your Agent. It includes the canonical Skill page and manifest.

Agent request
Review the Skillstore skill "security-and-hardening" from https://skillstore.io/skills/addyosmani-security-and-hardening.md and its manifest at https://skillstore.io/api/skills/addyosmani-security-and-hardening/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.

Your Agent should still show its plan and request any confirmation required by the security policy.

Test it

Using "security-and-hardening". Review an endpoint that accepts a webhook URL and fetches it on behalf of a user.

Expected outcome:

  • Risk: The server may be vulnerable to SSRF if it fetches arbitrary user-supplied URLs.
  • Control: Allowlist HTTPS hosts, resolve all addresses, reject private or reserved ranges, and disable redirects.
  • Verification: Test loopback, link-local, private IPv4, IPv6, redirect, and DNS-rebinding cases.

Using "security-and-hardening". Assess an LLM feature that renders model replies in a web page.

Expected outcome:

  • Risk: Model output is untrusted and may become stored XSS when inserted as HTML.
  • Control: Encode output as text by default, or sanitize approved markup before rendering.
  • Verification: Test script payloads, event handlers, malformed markup, and content from retrieved documents.

Using "security-and-hardening". Triage a high-severity package advisory from a native package-manager audit.

Expected outcome:

  • Decision: Confirm whether the vulnerable function is reachable in production, build, test, or deployment paths.
  • Action: Update to a patched version when available, review the lockfile diff, and test the resulting dependency graph.
  • Exception: Document a temporary deferral, mitigation, owner, and review date when the vulnerable path is confirmed unused.

Security Audit

Safe
v2 โ€ข 9/19/2026 Open versioned report

All 96 findings are false positives from examples and Markdown in SKILL.md. No executable behavior or prompt injection was found.

1
Files scanned
525
Lines analyzed
0
Review items
0
False positives ignored
No confirmed security findings were detected by the latest completed static and semantic audit. This does not prove the skill has no side effects.
Audited by: codex View Audit History โ†’
Share & cite this report

Share the versioned assessment report, neutral badge, embed card, and citations. Skillstore reports evidence without deciding whether this Skill is safe.

Open versioned report
Security Assessment

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https://skillstore.io/skills/addyosmani-security-and-hardening/audits/2?utm_source=security_passport&utm_medium=share&utm_campaign=versioned_report

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Academic citations (APA ยท BibTeX ยท CFF)

APA citation

addyosmani. (2026). security-and-hardening security audit report (audit version 2) [Author version unspecified]. Skillstore. https://skillstore.io/skills/addyosmani-security-and-hardening/audits/2

BibTeX citation

@techreport{addyosmani-addyosmani-security-and-hardening-2026, author = {addyosmani}, title = {security-and-hardening security audit report (audit version 2)}, institution = {Skillstore}, year = {2026}, number = {2}, url = {https://skillstore.io/skills/addyosmani-security-and-hardening/audits/2}, note = {Author version unspecified} }

CITATION.cff

cff-version: 1.2.0 message: "If you use this Skill, cite its author and this versioned security audit report." title: "security-and-hardening security audit report (audit version 2)" version: "unspecified" type: report authors: - name: "addyosmani" date-released: "2026-09-19" url: "https://skillstore.io/skills/addyosmani-security-and-hardening/audits/2" identifiers: - type: other value: "skillstore:addyosmani-security-and-hardening:audit:2" description: "Skillstore immutable audit report identifier"

Skillstore Score

Why this score Evidence Confidence: Medium
55
Architecture
85
Maintainability
87
Content
65
Community
87
Spec Compliance

What You Can Build

Review a New API Endpoint

Map trust boundaries, validate request data, check authorization, and identify abuse cases before shipping an endpoint.

Assess a Dependency Update

Triage audit results by reachability, review install scripts and provenance, and define a documented remediation decision.

Secure an AI Feature

Evaluate prompt injection, unsafe model output, excessive tool permissions, data exposure, and unbounded consumption risks.

Try These Prompts

Basic Security Review
Review this feature for trust boundaries, untrusted inputs, authentication, authorization, and sensitive data exposure. List the three most important fixes.
OWASP Endpoint Review
Audit this API endpoint against relevant OWASP risks. Check validation, queries, output encoding, access control, rate limits, errors, and logging. Cite issues and propose fixes.
Dependency Risk Triage
Triage these package audit results. Check reachability, available fixes, install scripts, provenance, and lockfile impact. Recommend an action and review date.
AI System Threat Model
Threat-model this LLM feature. Analyze prompt injection, unsafe output, data exposure, tool permissions, retrieval isolation, SSRF, limits, and irreversible actions. Prioritize controls and tests.

Best Practices

  • Start with assets, trust boundaries, abuse cases, and authorization assumptions before choosing controls.
  • Treat user input, external responses, files, environment values, and model output as untrusted until validated.
  • Pair every recommendation with an implementation check, a negative test, and an owner for follow-up.

Avoid

  • Do not treat a prompt, client-side check, framework default, or internal network as a complete security boundary.
  • Do not pass untrusted data into SQL, shells, eval, HTML, file paths, or privileged tools without strict validation.
  • Do not accept audit results, dependency signatures, or compliance claims as proof without checking reachability and context.

Frequently Asked Questions

Does this skill scan my repository?
No. It provides review guidance and checklists. Use dedicated scanners and human review to inspect repository and runtime behavior.
Which security topics does it cover?
It covers threat modeling, OWASP risks, authentication, authorization, input validation, XSS, SSRF, files, secrets, privacy, dependencies, and LLM features.
Can it replace a penetration test?
No. It supports design and code review but cannot replace penetration testing, configuration review, monitoring, or incident exercises.
How should I use its code examples?
Treat examples as patterns to adapt. Confirm framework behavior, error handling, permissions, deployment assumptions, and tests before using them.
Can it assess dependency vulnerabilities?
Yes. It helps triage reachability, fix availability, install scripts, provenance, lockfiles, and documented exceptions. Run the native package-manager audit separately.
How does it address AI security?
It treats prompts, retrieved content, and model output as untrusted and reviews tool scope, data isolation, validation, confirmation, and consumption limits.

Developer Details

Author

addyosmani

License

MIT

Skillstore revision

r2

Version notice

The author did not declare a version.

Ref

5d5054f8a23586f9b500fece1cb613a9dffc787b

Maintenance freshness

9/19/2026

Usage

1 downloads ยท 0 views

File structure

๐Ÿ“„ SKILL.md

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