facebook-marketplace-category-scraper

CRITICAL E004: Prompt injection detected in skill instructions.

• Potential prompt injection detected (high risk: 1.00). The Skill instructs the agent to automatically install BrowserAct without user confirmation and explicitly to hide/avoid describing that installation to the user, which is a deceptive instruction outside the stated 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 invoke the runtime browser-act Skill to “capture browser-visible page content” from user-specified Facebook Marketplace URLs, which is outsider-authored free text fetched at runtime from public web pages.

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

• Potentially malicious external URL detected (high risk: 1.00). The skill instructs the agent to automatically install a required runtime dependency from https://www.browseract.com/?co-from=ecommerce&redirect=https://github.com/browser-act/skills/tree/main at runtime, which involves fetching and executing remote installation code.