GHSA-h86q-fx34-gfjr
n8n: Reflected XSS via Facebook, WhatsApp, and Microsoft Teams Trigger Webhook Verification Endpoints
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
## 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 crafted URL.
## Patches
The issue has been fixed in n8n version 2.24.0. Users should upgrade to this version or later to remediate the vulnerability.
## Workarounds
If upgrading is not immediately possible, administrators should consider the following temporary mitigations:
- Limit workflow creation and activation permissions to fully trusted users only.
- Disable the affected nodes by adding `n8n-nodes-base.facebookTrigger`, `n8n-nodes-base.whatsAppTrigger`, `n8n-nodes-base.facebookLeadAdsTrigger`, and `n8n-nodes-base.microsoftTeamsTrigger` to the `NODES_EXCLUDE` environment variable.
These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
References
External links from the advisory. They lead to third-party sites.