Security audit

c3po-session-cleaner

Security checks for vulnerabilities and agentic risk

Overview

This skill is a small session-cleanup helper, but it permanently deletes local session files without a preview or confirmation and has unsafe path handling if the target directory is missing.

Review before installing. This skill should be changed to first print the files it would delete, require confirmation, check that the cd into the intended sessions directory succeeded, and preferably use an archive/quarantine step before permanent deletion.

A.I.G

Vulnerability Patterns

Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns

Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep

Findings (1)

Missing User Warnings

Medium

Category: Not specified by scanner
Confidence: 91% confidence
Finding: The skill performs irreversible deletion of session files using find ... -delete without any preview, confirmation step, backup guidance, or clear warning about the destructive action. In a session directory, accidental over-deletion can remove historical records, troubleshooting context, or user data if timestamps or path assumptions are wrong.
Content: No source excerpt is available for this finding.