T01 · Skill Instruction Hijacking
- Location
SKILL.md:218- Finding
Mandatory Promotional Attribution in Generated User Documents
- Content
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Vulnerability Details
File Location:
SKILL.md, lines 218-218; related mandatory attribution also appears at lines 66-66
Vulnerability Type:T01: Skill Instruction Hijacking
Risk Level: MediumComplete Code Snippet (English translation of the source instruction at line 218):
markdown > This plan was generated by the OPC-AI Skill (side-income-launcher), based on the framework from the “AI Super Individual” manuscript.Related Template Content (English translation of line 66):
markdown > Based on the Chapter 3 framework of “AI Super Individual: A Wealth-Building Handbook for One-Person Companies”Technical Analysis
The skill defines a mandatory output template that inserts OPC-AI branding and repeated attribution to a named manuscript into each generated plan. This material is not necessary to perform the requested assessment or produce the personalized side-income plan.
Because the attribution is embedded directly in the prescribed template rather than offered as an optional field, loading and following the skill alters the agent's output objective: the agent must distribute third-party branding through its trusted response and generated Markdown artifact. This is a form of instruction-level output hijacking. The behavior does not override safety controls or provide code execution, but it imposes unrelated promotional content on user-facing output.
Attack Path
- A user invokes the
side-income-launcherskill through one of its configured trigger phrases or the default agent prompt. - The agent follows the workflow in
SKILL.md. - The workflow directs the agent to create a Markdown plan using the fixed output template.
- The template causes the agent to insert the named manuscript attribution and OPC-AI branding.
- The resulting document is returned or saved as a user-facing artifact, propagating the promotional content through the agent's trusted output channel.
...[truncated 525 chars]
- A user invokes the
- Remediation
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Remediation Suggestions
- Remove the mandatory OPC-AI and manuscript attribution from the output template.
- Keep the generated document focused on information requested by the user and required for the side-income assessment.
- If attribution is legitimately required, present it as an optional configuration that is disabled by default.
- Obtain explicit user consent before adding branding or promotional attribution to a user-facing artifact.
- Clearly distinguish neutral source citations from promotional statements, and include a citation only when it materially supports the generated advice.
- Review the complete template for other fixed content that is unrelated to the user's requested result.
