{"id":"CVE-2026-104955","published":"2026-10-05T17:17:10.970","lastModified":"2026-10-07T21:17:09.583","description":"Plane is an open-source project management tool. Prior to 1.4.0, a Project Member with role 15 can send a PATCH request to the project-member update endpoint at /api/workspaces/{workspace_slug}/projects/{project_id}/members/{member_pk}/ to change another user's project role. The role-update logic blocks only a new role higher than the requester's role, so assigning the equal Member role bypasses the insufficient validation and promotes a Project Guest with role 5 to Member without Project Admin approval. This unauthorized promotion grants the guest the additional project capabilities associated with the Member role and allows a regular member to bypass project governance controls. This issue is fixed in 1.4.0.","cvssScore":5.4,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","cwes":["CWE-269","CWE-285"],"vendors":[],"products":[],"references":[{"url":"https://github.com/makeplane/plane/commit/4c1bdd1d625fa3f1141e8af9c15423946472069e","tags":[]},{"url":"https://github.com/makeplane/plane/pull/9014","tags":[]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-x63v-p7wc-47x4","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-x63v-p7wc-47x4","tags":[]}],"exploitRefs":[{"url":"https://github.com/makeplane/plane/commit/4c1bdd1d625fa3f1141e8af9c15423946472069e","tags":[]},{"url":"https://github.com/makeplane/plane/pull/9014","tags":[]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-x63v-p7wc-47x4","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-x63v-p7wc-47x4","tags":[]}],"hasPoc":true,"ai":null}