What is CVE-2026-30242?

CVE-2026-30242 is a high-severity vulnerability in Makeplane Plane, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.5/10. Published 2026-03-06.

How severe is CVE-2026-30242?

High severity. CVSS v3 base score is 8.5 out of 10.

SSRF in Makeplane Plane

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.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-03-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Makeplane Plane — versions < 1.2.3
Plane

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

github.com/makeplane/plane/security/advisories/GHSA-fpx8-73gf-7x73 (Vendor Advisory)
github.com/makeplane/plane/releases/tag/v1.2.3 (Release Notes)

Frequently asked questions

What is CVE-2026-30242?: CVE-2026-30242 is a high-severity vulnerability in Makeplane Plane, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.5/10. Published 2026-03-06.
How severe is CVE-2026-30242?: High severity. CVSS v3 base score is 8.5 out of 10.