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Security audit

Workflow Checkpoint

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward workflow checkpointing guide, but users should avoid storing sensitive task details in its persistent checkpoint files.

Install only if you want agents to write local checkpoint files for multi-step work. Do not checkpoint secrets, credentials, private customer data, sensitive outputs, or internal host details, and periodically delete old files under memory/checkpoints.

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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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
Findings (3)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
90% confidence
Finding

The skill directs checkpointing for "every multi-step workflow," which is overly broad and can cause routine persistence of workflow state, outputs, and artifact paths even when unnecessary. In practice this increases the chance that sensitive operational details, partial outputs, or environment metadata are written to disk and later exposed or reused inappropriately.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The checkpoint format explicitly stores outputs, errors, timestamps, and artifact paths on disk under memory/checkpoints, but the skill does not prominently warn that this creates persistent local records. That omission can lead users or agents to serialize sensitive workflow results, internal paths, host addresses, or operational errors into files that may outlive the session and be readable by other processes or users.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
85% 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 141)May include surrounding context.

md
❌ Don't save checkpoints for single-step tasks
❌ Don't save sensitive data in checkpoint files
❌ Don't skip verification when resuming
❌ Don't forget to clean up old checkpoints

## License

Static analysis

No suspicious patterns detected.