{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68561","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-30T19:56:44.102Z","datePublished":"2026-08-19T19:24:58.933Z","dateUpdated":"2026-08-25T13:57:28.356Z"},"containers":{"cna":{"title":"Wekan: a low-privilege board member escalates to board admin and takes over a private board via the `sort` collection-allow rule","problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","description":"CWE-269: Improper Privilege Management","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/wekan/wekan/security/advisories/GHSA-xm8x-c8wg-jhmf","tags":["x_refsource_CONFIRM"],"url":"https://github.com/wekan/wekan/security/advisories/GHSA-xm8x-c8wg-jhmf"},{"name":"https://github.com/wekan/wekan/commit/dc135f6e7d59f9f56065cd5df83b1f123ea120bb","tags":["x_refsource_MISC"],"url":"https://github.com/wekan/wekan/commit/dc135f6e7d59f9f56065cd5df83b1f123ea120bb"},{"name":"https://github.com/wekan/wekan/releases/tag/v9.89","tags":["x_refsource_MISC"],"url":"https://github.com/wekan/wekan/releases/tag/v9.89"}],"affected":[{"vendor":"wekan","product":"wekan","versions":[{"version":"< 9.89","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-19T19:24:58.933Z"},"descriptions":[{"lang":"en","value":"Wekan is open source kanban built with Meteor. Prior to 9.89, the second Boards.allow({ update }) rule in server/permissions/boards.js called canUpdateBoardSort in server/lib/utils.js, which authorized any board member whenever fieldNames included sort. Because Meteor combines allow rules with OR semantics and applies the complete modifier, a comment-only or read-only member could send one Boards.update with $set values for sort, members, permission, and title, make themselves the sole board administrator, expose a private board, and evict the legitimate owner; the last-admin deny rule inspected only $pull and did not block a wholesale $set of members. Version 9.89 requires sort to be the only modified field and rejects $set member arrays that remove the last active administrator. This issue is fixed in version 9.89."}],"source":{"advisory":"GHSA-xm8x-c8wg-jhmf","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/wekan/wekan/security/advisories/GHSA-xm8x-c8wg-jhmf","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-25T13:57:05.363320Z","id":"CVE-2026-68561","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-25T13:57:28.356Z"}}]}}