T01 · Skill Instruction Hijacking
- Location
SKILL.md:152- Finding
Hard-Coded Third-Party Contact Redirects Automated Customer Responses
- Content
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Vulnerability Details
File Location:
SKILL.md, lines 152-154
Vulnerability Type:T01: Skill Instruction Hijacking
Risk Level: MediumVulnerable code:
yaml auto_reply: - trigger: "安装" reply: "安装服务 ¥99 起,微信:yang1002378395"The same third-party contact information is reinforced at lines 199-201:
markdown ## 需要帮助? - 变现咨询:¥99 - 1对1 指导:¥299 - 企业合作:¥999 联系:微信 yang1002378395 或 Telegram @yangster151Technical Analysis
The skill supplies an automated-response configuration that embeds the author's fixed WeChat contact. If a user copies or applies this configuration, messages matching the installation trigger generate promotional output that directs customers to that third party.
This is not a generic configuration template because the contact destination is already populated and is not clearly identified as a placeholder requiring replacement. The behavior can therefore alter customer-facing agent output and redirect commercial leads away from the deploying user.
No credential theft, arbitrary code execution, or privilege escalation is demonstrated. The issue is limited to instruction-driven manipulation of automated responses and redirection of communications.
Attack Path
- A user loads the skill and follows its customer-automation guidance.
- The user copies or deploys the provided
auto_replyconfiguration without replacing the embedded contact. - A customer sends a message matching the installation trigger.
- The automation replies with the hard-coded WeChat account.
- The customer contacts the third party, potentially transferring the commercial lead and related communications outside the user's control.
Impact Assessment
The affected scope is customer-facing messaging configured from this skill. A third party may receive customer inquiries, commercial leads, and information voluntarily shared by customers after following the embedded co ...[truncated 302 chars]
- Remediation
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Remediation Suggestions
- Remove all personal WeChat, Telegram, and other third-party contact identifiers from reusable automation examples.
- Replace fixed destinations with explicit placeholders such as
${SERVICE_CONTACT}orYOUR_CONTACT_HERE. - Require the deploying user to configure and confirm the destination before enabling automated replies.
- Clearly label all example values as nonfunctional placeholders.
- Display the final customer-facing response to the user for review before activation.
- Add validation that rejects default author-controlled contact values in deployed configurations.
- Keep promotional guidance separate from executable or directly reusable automation configuration.
