CVE-2026-30242 HIGH

CVE-2026-30242: Plane: SSRF via Incomplete IP Validation in Webhook URL Serializer

Vendor Makeplane
Product plane
Weakness CWE-918 · SSRF
Published March 6, 2026
Last update March 9, 2026
View on NVD All CVEs

CVSS base score

8.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 6, 2026 CVE published
March 9, 2026 Record updated