{"id":"CVE-2026-105634","published":"2026-10-05T19:17:17.330","lastModified":"2026-10-06T15:17:13.693","description":"Plane is an open-source project management tool. Prior to 1.3.0, the ProjectMemberViewSet.partial_update method allows any project member, including a user with the lowest GUEST role, to modify another project member's role. The authorization check prevents assigning a role higher than the requester's role but does not prevent assigning a lower or equal role, allowing a Guest to demote Administrators and Members and deny them project control. This vulnerability is fixed in 1.3.0.","cvssScore":8.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","cwes":["CWE-269"],"vendors":[],"products":[],"references":[{"url":"https://github.com/makeplane/plane/commit/587fe76032fb69275866fdeb655699a70a83c521","tags":[]},{"url":"https://github.com/makeplane/plane/pull/8833","tags":[]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.3.0","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-494h-3rcq-5g3c","tags":[]}],"exploitRefs":[{"url":"https://github.com/makeplane/plane/commit/587fe76032fb69275866fdeb655699a70a83c521","tags":[]},{"url":"https://github.com/makeplane/plane/pull/8833","tags":[]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.3.0","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-494h-3rcq-5g3c","tags":[]}],"hasPoc":true,"ai":{"summary":"This vulnerability allows any project member, including a guest, to demote other members to a lower role, potentially denying them project control. This is significant because it can lead to unauthorized access and control over project resources.","exploitability":"Exploitation is relatively easy as it requires only a project member with the GUEST role to modify another member's role. Precondition is access to the ProjectMemberViewSet.partial_update method.","blast_radius":"If exploited, this could result in loss of control over project resources, potentially leading to project delays or misuse of resources.","remediation":"Upgrade to version 1.3.0 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","web","project-management"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-06T08:45:36.721Z"}}