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n8n: Reflected XSS via Facebook, WhatsApp, and Microsoft Teams Trigger Webhook Verification Endpoints

🗓️ 16 Jun 2026 22:39:16Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 7 Views

Impact An endpoint in the Meta and Microsoft Teams trigger nodes reflects a query parameter into the HTTP response without sanitization or Content-Security-Policy headers, enabling reflected XSS in the n8n origin when a logged-in user visits a cra...

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16 Jun 2026 22:39Current
5.2Medium risk
Vulners AI Score5.2
EPSS0.00038
7