{"id":"CVE-2026-30242","published":"2026-03-06T21:19:24Z","modified":"2026-03-09T20:54:28Z","title":"Plane: SSRF via Incomplete IP Validation in Webhook URL Serializer","vendor":"makeplane","product":"plane","tier":"tail","description":{"text":"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.","provenance":"source","from":"CVE.org"},"cvss":{"score":8.5,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.0035,"percentile":0.28586,"provenance":"source"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"references":[{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-fpx8-73gf-7x73","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.2.3","tags":["x_refsource_MISC"]}],"priority":{"score":11.7,"factors":[{"name":"EPSS percentile","points":5.72},{"name":"CVSS severity","points":5.95}]},"vendorSlug":"makeplane","affectedVersions":[{"vendor":"makeplane","product":"plane","versions":["< 1.2.3"]}],"affected":[{"ecosystem":"PyPI","package":"plane","vulnerableRanges":["<1.2.3"],"patched":["1.2.3"],"from":["GHSA-fpx8-73gf-7x73"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-10082","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-makeplane-plane-cve-2026-30242","children":[{"from":"CVE-2026-30242","to":"CVE-2026-104973","relation":"incomplete-fix","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"incomplete-fix","quote":"Prior to 1.4.0, the fix for CVE-2026-30242 validates webhook IP addresses only when the webhook is created in apps/api/plane/app/serializers/webhook.py.","from":"CVE.org","in":"CVE-2026-104973"}]}]}}