{"id":"CVE-2026-72831","title":"Grav through 2.0.11 Authentication Bypass via Flex Objects","summary":"The Flex Objects plugin (through 1.4.6, tested with Grav 2.0.11) contains an incorrect authorization vulnerability in its Flex Objects API. FlexApiController::update() checks only the general Flex directory permission and does not apply …","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-863"],"vendor":"getgrav","product":"grav","affected":["grav >= 2.0.11 <= 2.0.11","grav-plugin-flex-objects < 1.4.7"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-08-18T01:59:11.497559Z"},"exploitAvailable":true,"published":"2026-08-14","updated":"2026-10-29","sourceUpdated":"2026-10-29T21:16:51.350Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72831","references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-pc8m-jxvh-vmrc","label":"GitHub Security Advisory (GHSA-pc8m-jxvh-vmrc)"},{"url":"https://github.com/getgrav/grav/commit/ad9709f865b09b68798fb1ac375b484a8cc1d892","label":"Patch Commit"},{"url":"https://github.com/trilbymedia/grav-plugin-flex-objects/commit/0b384f5b0e73b1ad9dd29c70185407895ea3b09f","label":"Patch Commit"},{"url":"https://github.com/getgrav/grav-plugin-api/commit/8071c10bc3a4743a4b8cf003dfb1644d6680c2ea","label":"Patch Commit"},{"url":"https://github.com/getgrav/grav-plugin-admin2/commit/a0bf26f7e5d7a98894b7cd2b8c5afe419b264e53","label":"Patch Commit"},{"url":"https://www.vulncheck.com/advisories/grav-through-authentication-bypass-via-flex-objects","label":"VulnCheck Advisory: Grav through 2.0.11 Authentication Bypass via Flex Objects"}],"tags":["cve.org","exploit-available"],"epss":0.00855,"epssPercentile":0.58379,"ingestedAt":"2026-11-03T08:39:35.602Z","slug":"CVE-2026-72831","body":"## Overview\n\nThe Flex Objects plugin (through 1.4.6, tested with Grav 2.0.11) contains an incorrect authorization vulnerability in its Flex Objects API. FlexApiController::update() checks only the general Flex directory permission and does not apply the additional target/field/super-admin checks enforced by the dedicated Users and Groups API controllers. An authenticated account with api.access, admin.login, and users.update permissions (but without api.users.write or admin.super) can use the generic /api/v1/flex-objects/user-accounts endpoint to change a super administrator's password, or the /api/v1/flex-objects/user-groups endpoint to grant its group admin.super, resulting in full site takeover. Fixed in Flex Objects 1.4.7.\n\n## Affected\n\n- `grav >= 2.0.11 <= 2.0.11`\n- `grav-plugin-flex-objects < 1.4.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":61,"depthScoreParts":{"impact":48.4,"likelihood":0.2,"exploitation":12,"ransomware":0},"changes":[]}