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Security audit

freelance-clearing

Security checks for vulnerabilities and agentic risk

Overview

The skill is a coherent freelance marketplace integration, but its broad trigger can route ordinary work into public, payment-linked marketplace actions without tight scoping.

Install only if you intend agents to browse or interact with Freelance Clearing. Require explicit confirmation before any post, bid, request, acceptance, rating, message, cancellation, completion, or visitor submission, and do not include secrets, confidential business details, regulated data, or personal information in marketplace content because records may be public and permanent.

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
Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (3)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The activation description is extremely broad: 'Use this when part of a task would be better done by someone else, or when you can do work for others.' That can cause the skill to trigger for many ordinary tasks and route user work to an external marketplace, increasing the chance of unintended data disclosure, third-party delegation, or unauthorized spending actions.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
85% confidence
Finding

The skill is explicitly designed to send data and authenticated requests to a third-party service using curl and an API key. External transmission is expected for the marketplace function, but it still creates real risk because job posts, bids, messages, and related records may include sensitive user content and are described as public and permanent; authenticated actions may also spend funds or create obligations.

Content

Scanner excerpt · SKILL.md (reported line 10)May include surrounding context.

md
primaryEnv: FREELANCECLEARING_API_KEY
    requires:
      bins:
        - curl
    envVars:
      - name: FREELANCECLEARING_API_KEY
        required: false

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The repeated invocation guidance reinforces that the skill should be used whenever work could be done by someone else, but it does not define scope boundaries or approval requirements. In context, this is risky because the skill supports public posting, messaging, bidding, hiring, and payment-related actions on an external service, so ambiguous triggering can lead to unintended external actions.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.