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Security audit

Cron

Security checks for vulnerabilities and agentic risk

Overview

This skill is a small local scheduling instruction file with disclosed local storage and no bundled executable code or network behavior, though its broad triggers and exec access deserve caution.

Install only if you want an agent to help manage local recurring schedules and potentially use command-line execution for that workflow. Review any job before enabling it, since cron-style automation can repeatedly run local actions even when the skill itself stores data only locally.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
90% confidence
Finding

The file includes substantial Chinese-language descriptive content and labels while the rest of the document is in English, but it does not state that Chinese is optional or provide a language-selection mechanism. This can violate language or locale policy when a skill implicitly forces or assumes a language without user opt-in.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The trigger keywords are very broad (schedule, local, engine, cron, recurring) and the skill exposes the exec tool, increasing the chance of unintended activation in unrelated conversations. Accidental invocation of a scheduling/execution-oriented skill can cause the agent to perform local command actions when the user did not explicitly intend to use this skill.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.