Vulnerability · Published Mar 6, 2026 · Assigned by GitHub_M

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

High 8.5

In plain English

A high-severity server-side request forgery in plane from makeplane. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.5High

Exploit odds (30 days)0.4%top 68.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	plane	1.2.3	GHSA-fpx8-73gf-7x73

Affected products (as reported)

Vendor	Product	Versions
makeplane	plane	< 1.2.3

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

References

https://github.com/makeplane/plane/security/advisories/GHSA-fpx8-73gf-7x73 x_refsource_CONFIRM
https://github.com/makeplane/plane/releases/tag/v1.2.3 x_refsource_MISC