{"id":"CVE-2026-86731","title":"Craft CMS versions 5.0.0-RC1 through 5.10.11 are missing an admin-target guard in UsersController::actionActivateUser (the users/activate-user action)","summary":"Craft CMS versions 5.0.0-RC1 through 5.10.11 are missing an admin-target guard in UsersController::actionActivateUser (the users/activate-user action). While the action requires the administrateUsers permission, it does not call requireA…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-862"],"vendor":"craftcms","product":"cms","affected":["cms >= 5.0.0-RC1 < 5.10.12"],"published":"2026-09-08","updated":"2026-09-19","sourceUpdated":"2026-09-19T15:17:06.890","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-86731","references":[{"url":"https://github.com/craftcms/cms/security/advisories/GHSA-jqf5-vfg6-8cx5","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/craft-cms-5.0.0-rc1-before-5.10.12-permission-escalation-via-userscontroller","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"epss":0.00311,"epssPercentile":0.21324,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-18T17:43:43.578474Z"},"ingestedAt":"2026-09-08T15:33:26.987Z","slug":"CVE-2026-86731","body":"## Overview\n\nCraft CMS versions 5.0.0-RC1 through 5.10.11 are missing an admin-target guard in UsersController::actionActivateUser (the users/activate-user action). While the action requires the administrateUsers permission, it does not call requireAdmin() when the targeted user is an administrator, unlike the mirror action actionDeactivateUser. As a result, an authenticated control panel user who is not an administrator but holds the administrateUsers permission can activate a pending or deliberately deactivated administrator account, which can lead to permission escalation when combined with resetting that account's password. The issue is fixed in Craft CMS 5.10.12.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}