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Security audit

Precleared Cold Email Check

Security checks for vulnerabilities and agentic risk

Overview

The skill’s email-compliance checks match its stated purpose, with clearly disclosed data sharing and no hidden background behavior found.

Install if you are comfortable sharing recipient addresses and campaign facts with Precleared. Use --dry-run to preview requests, keep receipt links private, and treat results as decision support rather than a legal guarantee. The service's live privacy policy could not be retrieved during this review.

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
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

Skill declares no tool scope ('permissions' or 'allowed-tools') but code capabilities were detected: env, network.

Medium
Category
MCP Least Privilege
Confidence
70% confidence
Finding

Without declared permissions the skill's intent is opaque and cannot be validated.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 57)May include surrounding context.

Without node, call the REST API with curl:

bash
curl -s https://precleared.dev/api/v1/check -H 'Content-Type: application/json' \
  -A 'precleared-skill/1.0.2 (cold-email-check; clawhub)' \
  -d '{"recipient_email":"jane@acme.co.uk","sender_country":"GB","address_source":"SOURCE","pitch":"bookkeeping software"}'

Static analysis

Detected: suspicious.env_credential_access

Environment variable access combined with network send.

Critical
Code
suspicious.env_credential_access
Location
scripts/check.mjs:330