hunt-nextjs
Hunt Next.js specific vulnerabilities — Server Actions arbitrary function execution, Middleware auth bypass via static asset paths, ISR cache poisoning, Image Optimization SSRF (/_next/image), RSC payload leakage, getServerSideProps injection, source map exposure, debug endpoint leakage. Use when target runs Next.js 13/14/15 or any React SSR framework.
71
87%
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Critical
Do not install without reviewing
Security
2 findings: 1 critical severity, 1 high severity. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E004: Prompt injection detected in skill instructions.
What this means
Detected a prompt injection in the skill instructions. The skill contains hidden or deceptive instructions that fall outside its stated purpose and attempt to override the agent’s safety guidelines or intended behavior.
Why it was flagged
This skill contains explicit, actionable step-by-step instructions (curl commands, headers, payloads) to perform SSRF, auth bypass, arbitrary Server Action execution, cache poisoning and secret exfiltration from Next.js apps.
W007: Insecure credential handling detected in skill instructions.
What this means
The skill handles credentials insecurely by requiring the agent to include secret values verbatim in its generated output. This exposes credentials in the agent’s context and conversation history, creating a risk of data exfiltration.
Why it was flagged
The playbook contains curl commands that explicitly place session cookies and revalidation secrets as header/query values (e.g., session=VICTIM_SESSION, ?secret=GUESS), which would require an agent to insert real secret values verbatim into generated requests/commands — an exfiltration risk.
Low
Low-risk findings.
1 low severity finding. Worth noting, but not necessarily harmful.
W011: Third-party content exposure detected (indirect prompt injection risk).
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
The skill reads outsider-controlled free text at runtime by having the operator probe targets for attacker-influenced content endpoints (e.g., `/_next/image?url=...`, `/_next/data/...json`, and pages containing `__NEXT_DATA__`) and then ingest the HTTP responses (which can include or reflect attacker payloads) for analysis.
- Repository
- elementalsouls/Claude-BugHunter
- Commit
646b72e
- Audited
- Security analysis
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