What’s Vulnerable › Vulnerabilities
CVE-2026-54303: n8n: Reflected XSS via Facebook, WhatsApp, and Microsoft Teams Trigger Webhook Verification Endpoints
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-23 · updated 2026-10-26
- Weakness: CWE-79
Description
n8n is an open source workflow automation platform. Prior to 2.24.0, 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 crafted URL. This vulnerability is fixed in 2.24.0.
Affected products
- n8n-io n8n: before 2.24.0 — fixed in 2.24.0
How to fix
Upgrade to a fixed version: n8n-io n8n 2.24.0. Check the vendor advisory for mitigations.
References
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