{"id":"CVE-2026-105634","state":"PUBLISHED","title":"Plane: Privilege Escalation: Project Guest Can Demote Admin/Member Roles","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.","publishedAt":"2026-10-05T18:00:50.831Z","updatedAt":"2026-10-06T14:52:51.459Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["makeplane plane"],"affected":[{"vendor":"makeplane","product":"plane","versions":[{"version":"< 1.3.0","status":"affected"}]}],"references":["https://github.com/makeplane/plane/security/advisories/GHSA-494h-3rcq-5g3c","https://github.com/makeplane/plane/pull/8833","https://github.com/makeplane/plane/commit/587fe76032fb69275866fdeb655699a70a83c521","https://github.com/makeplane/plane/releases/tag/v1.3.0"],"weaknesses":["CWE-269"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/105xxx/CVE-2026-105634.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-105634","state":"PUBLISHED","datePublished":"2026-10-05T18:00:50.831Z","dateUpdated":"2026-10-06T14:52:51.459Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-05T16:40:39.611Z"},"containers":{"cna":{"title":"Plane: Privilege Escalation: Project Guest Can Demote Admin/Member Roles","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"makeplane","product":"plane","versions":[{"version":"< 1.3.0","status":"affected"}]}],"references":[{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-494h-3rcq-5g3c","name":"https://github.com/makeplane/plane/security/advisories/GHSA-494h-3rcq-5g3c","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/makeplane/plane/pull/8833","name":"https://github.com/makeplane/plane/pull/8833","tags":["x_refsource_MISC"]},{"url":"https://github.com/makeplane/plane/commit/587fe76032fb69275866fdeb655699a70a83c521","name":"https://github.com/makeplane/plane/commit/587fe76032fb69275866fdeb655699a70a83c521","tags":["x_refsource_MISC"]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.3.0","name":"https://github.com/makeplane/plane/releases/tag/v1.3.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","description":"CWE-269: Improper Privilege Management","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-05T18:00:50.831Z"},"source":{"advisory":"GHSA-494h-3rcq-5g3c","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-06T14:34:17.859962Z","id":"CVE-2026-105634","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-06T14:52:51.459Z"}}]}}}