CVE-2026-30242

Plane is an an open-source project management tool. Prior to version 1.2.3, the webhook URL validation in plane/app/serializers/webhook.py only checks ip.is_loopback, allowing attackers with workspace ADMIN role to create webhooks pointing to private/internal network addresses (10.x.x.x, 172.16.x.x, 192.168.x.x, 169.254.169.254, etc.). When webhook events fire, the server makes requests to these internal addresses and stores the response — enabling SSRF with full response read-back. This issue has been patched in version 1.2.3.

• CWE-918

• https://github.com/makeplane/plane/releases/tag/v1.2.3Release Notes
• https://github.com/makeplane/plane/security/advisories/GHSA-fpx8-73gf-7x73Vendor Advisory

Published

Mar 6, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

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