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.
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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.
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 document contains explicit, step-by-step exploit instructions and payloads to achieve remote code execution across multiple platforms, making it clearly malicious.
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 explicitly instructs generating and delivering serialized gadget payloads (ysoserial, phpggc, Python pickle, YSoSerial.Net, JNDI/Log4Shell) that perform remote command execution (e.g., ysoserial writing "id > /tmp/pwned", a Python Exploit.__reduce__ calling os.system, and JNDI payloads to load remote classes), demonstrating clear intent and a viable runtime mechanism to violate target systems' authority.
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 explicitly downloads and runs remote tooling during runtime (e.g., wget https://github.com/frohoff/ysoserial/releases/latest/download/ysoserial-all.jar and git clone https://github.com/ambionics/phpggc and git clone https://github.com/pimps/JNDI-Exploit-Kit), which fetches and executes remote code that the skill relies on.
- Repository
- elementalsouls/Claude-BugHunter
- Commit
58017df
- Audited
- Security analysis
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