hunt-csrf
Hunting skill for csrf vulnerabilities. Built from 15 public bug bounty reports including modern variants — SameSite=Lax sibling-subdomain bypass (Argo CD CVE-2024-22424), GraphQL mutations-via-GET (GitLab $3,370), framework-wide CSRF middleware disabled (Stripe Dashboard $5,000), path-traversal CSRF-token bypass (GitHub Enterprise CVE-2022-23732 $10k), Origin-omission bypass (TikTok $2,500), OAuth-state null-byte (Streamlabs), WebSocket CSRF / CSWSH (Coda), default-SameSite email-change → ATO (YoYo Games $400), social-account-link CSRF (HackerOne), JSON-CSRF via text/plain on email-change (TikTok $500). Use when hunting modern CSRF — heavy emphasis on chain-to-ATO patterns.
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Critical
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Security
3 findings: 2 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
The document is a defensive-oriented but dual-use security-research guide that gives explicit, actionable instructions and PoCs for exploiting CSRF vulnerabilities (header spoofing, token omission/reuse, form/json PoCs), which can be used offensively despite its bug-hunting framing.
E006: Malicious code pattern detected in skill scripts.
What this means
Detected high-risk code patterns in the skill content — including its prompts, tool definitions, and resources — such as data exfiltration, backdoors, remote code execution, credential theft, system compromise, supply chain attacks, and obfuscation techniques.
Why it was flagged
The document clearly provides actionable, runtime exploit instructions (runnable curl commands, HTML PoC forms, fetch payloads and header spoofing examples) intended to perform CSRF attacks that can lead to account takeover or unauthorized state changes, demonstrating intent to violate user authority and a viable execution mechanism.
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 skill includes concrete curl/PoC examples that capture session tokens and cookies (TOKEN_A, session=YOUR_SESSION, oauth_token_here) and instruct replaying them verbatim in requests, which requires reading and embedding secret values into generated commands or outputs.
- Repository
- elementalsouls/Claude-BugHunter
- Commit
58017df
- Audited
- Security analysis
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