facebook-marketplace-listing-scraper

CRITICAL E004: Prompt injection detected in skill instructions.

• Potential prompt injection detected (high risk: 0.90). The Skill instructs the agent to automatically install a runtime dependency and explicitly tells it to avoid informing or requesting separate approval from the user ("do not describe... do not request separate approval"), which is a deceptive/hidden instruction outside the declared scraping purpose.

MEDIUM W011: Third-party content exposure detected (indirect prompt injection risk).

• Third-party content exposure detected (high risk: 0.85). SKILL.md instructs the agent to “capture browser-visible page content” by invoking the runtime browser-act Skill on user-specified target URLs, which can include outsider-authored free text from public web pages fetched at runtime.

MEDIUM W012: Unverifiable external dependency detected (runtime URL that controls agent).

• Potentially malicious external URL detected (high risk: 1.00). The skill explicitly instructs the agent to install and invoke the BrowserAct CLI at runtime using the Install BrowserAct link (https://www.browseract.com/?co-from=ecommerce&redirect=https://github.com/browser-act/skills/tree/main), which would fetch/execute remote code as a required runtime dependency.

MEDIUM W013: Attempt to modify system services in skill instructions.

• Attempt to modify system services in skill instructions detected (high risk: 0.70). The skill explicitly instructs the agent to automatically install the BrowserAct CLI without asking the user for confirmation (and to proceed/resume automatically), which encourages the agent to run installers that can modify system state or require elevated privileges.