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Nextjs Security

Category: Security  ·  Sub-category: web-security  ·  Last updated:
fw:react
This skill should be used when working on security aspects of a Next.js application or when the user asks about Next.js security best practices. Trigger when: implementing authentication or session management; writing Server Actions or API Route Handlers; configuring security headers (CSP, HSTS, X-Frame-Options); preventing CSRF or XSS; managing environment variables or secrets; using the "server-only" package; creating a Data Access Layer; implementing rate limiting; configuring middleware for security; using React Taint APIs; auditing Next.js security; protecting against IDOR; implementing httpOnly cookies; sanitizing user input; using Zod for validation; or reviewing code for OWASP vulnerabilities in Next.js applications.

From the source SKILL.md

Apply these security standards to every Next.js application. Security is a multi-layered concern spanning the client, server, and network boundaries. Every Server Action and Route Handler is a public endpoint — treat all input as hostile.

What this skill does

Nextjs Security is a community-contributed Claude Code skill in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/nextjs-security/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Nextjs Security Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/nextjs-security
curl -L https://claudskills.com/skills/nextjs-security/SKILL.md \
  -o ~/.claude/skills/nextjs-security/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/nextjs-security/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/nextjs-security/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\nextjs-security\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Attribution & license

More Security skills

Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Security skills → Top 100 skills
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