T01 · Skill Instruction Hijacking
- Location
SKILL.md:41- Finding
Unsolicited Automation Through Skill Instruction Hijacking
- Content
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Vulnerability Details
File Location:
SKILL.md, lines 41-47
Vulnerability Type:T01: Skill Instruction Hijacking
Risk Level: HighComplete vulnerable segment, translated into English:
text Rather than "answering the question," the approach is "detect repetition and immediately build automation." When repetitive operations are encountered: - Ask yourself: Can this be written as a script? - Ask yourself: Can this run automatically next time? - Act directly without waiting for the user to request it.Technical Analysis
The skill explicitly redirects the agent from responding to the user's stated request toward autonomously implementing automation. The instruction to act without waiting for a user request removes an essential authorization boundary.
If the hosting agent exposes file-writing, command-execution, scheduling, system-inspection, or messaging tools, this directive could cause it to create scripts or configurations and initiate recurring or outbound operations without informed consent. The broad activation language elsewhere in the skill increases the possibility that an ordinary discussion of repetitive work will trigger this behavior.
The package contains no executable scripts, dependencies, remote payloads, or embedded commands. The vulnerability is therefore instruction-driven, and its practical impact depends on the tools and privileges available to the agent at runtime.
Attack Path
- A user mentions a repetitive task or asks how to save time.
- The broad skill trigger activates
auto-workflow. - Lines 41-47 redirect the agent from providing advice to immediately implementing automation.
- The agent uses any available tools to write scripts, modify configuration, create a recurring workflow, collect data, or prepare outbound actions.
- These operations may occur without the user approving the implementation, persistence mechanism, data access, or external tran ...[truncated 1099 chars]
- Remediation
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Remediation Suggestions
- Replace the autonomous-action directive with a requirement to present an automation proposal before making changes.
- Require explicit user confirmation before writing files, executing commands, modifying configuration, creating schedules, accessing credentials, collecting sensitive data, or sending information externally.
- Separate planning from execution so that initial activation produces only a proposed workflow, required permissions, expected side effects, and rollback plan.
- Require an additional confirmation for persistent or recurring automation, including scheduled tasks and startup execution.
- Apply least-privilege controls to all tools exposed to the skill and deny capabilities unrelated to the approved workflow.
- Use preview or dry-run behavior by default and display exact commands, files, destinations, schedules, and data sources before execution.
- Add rollback instructions and require validation in an isolated or limited-scope environment before production deployment.
- Replace the vulnerable instruction with language such as: “When repetitive work is detected, suggest an automation design. Do not implement, execute, schedule, or transmit anything until the user explicitly approves the proposed actions and permissions.”