CVE-2026-30242CWE-918

Plane: SSRF via Incomplete IP Validation in Webhook URL Serializer

High · published March 6, 2026

CVSS v3.1
8.5
EPSS
0%
Percentile
26.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00340 · 26.3th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-03-06T21:19Z
EPSS history
Timeline
  • 06 MAR 21:19Z
    Plane: SSRF via Incomplete IP Validation in Webhook URL Serializer
    cvelistv5