hunt-deserialization
Hunt Insecure Deserialization — Java gadget chains (ysoserial), PHP object injection (phpggc), Python pickle RCE, .NET BinaryFormatter, Ruby Marshal.load, JNDI/Log4Shell. RCE via deserialization is almost always Critical. Use when target runs Java, PHP serialization, Python pickle, .NET, or Ruby on Rails.
72
90%
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Critical
Do not install without reviewing
Security
2 findings: 2 critical severity. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E005: Suspicious download URL detected in skill instructions.
What this means
Detected a suspicious URL in the skill instructions that could lead the agent to download and execute malicious scripts or binaries. This includes links to executables from untrusted sources, typosquatting of official packages, URL shorteners that obscure the destination, and personal file hosting services.
Why it was flagged
Several links point to exploit/tooling repositories and a direct executable JAR (ysoserial) commonly used to craft and deliver deserialization payloads, making them high-risk sources for malware distribution.
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 is an explicit offensive guide providing ready-to-run exploit payloads and tooling to achieve remote code execution, OOB callbacks, and data exfiltration to attacker-controlled hosts — clearly enabling malicious abuse.
Low
Low-risk findings.
1 low severity finding. Worth noting, but not necessarily harmful.
W012: Unverifiable external dependency detected (runtime URL that controls agent).
What this means
The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.
Why it was flagged
The skill instructs the operator to fetch and execute remote tooling during runtime (e.g., wget https://github.com/frohoff/ysoserial/releases/latest/download/ysoserial-all.jar, git clone https://github.com/ambionics/phpggc, git clone https://github.com/pimps/JNDI-Exploit-Kit), which downloads third-party code that the workflow then runs to generate payloads, so these are runtime external dependencies that execute code.
- Repository
- elementalsouls/Claude-BugHunter
- Commit
6b9c96e
- Audited
- Security analysis
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