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Security audit

cron402

Security checks for vulnerabilities and agentic risk

Overview

This skill handles paid remote cron jobs and wallet secrets, but its sensitive behavior is clearly disclosed, scoped, and requires user confirmation.

Install only if you intend to use cron402 as a paid remote scheduler. Use a dedicated low-balance wallet, review any URL, headers, body, or notify URL before creating a job, and avoid sending reusable admin credentials or session cookies because job configuration may be retained by the remote service while the job exists.

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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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)

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 174)May include surrounding context.

  1. Health check (loopback only):

    sh
    curl -s http://127.0.0.1:7331/health

    Expect { "ok": true }. If connection refused, ask the human to run abra serve.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 190)May include surrounding context.

md
(e.g. `CRON402_PRIVATE_KEY was loaded`) — never quote the key material.
   See abracadabra skill secret-loading safety rules.

3. **Hard rule:** never ask the user to paste a private key into chat. Discover the
   vault key name, fetch it, inject into env.

## Paying cron402 settles from abra treasury

Static analysis

No suspicious patterns detected.