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CVE-2026-86731

Craft CMS 5.0.0-RC1 before 5.10.12 Permission Escalation via UsersController

CVSS 4.0 7.1 HIGHCVSS 3.1 6.5 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-86731

Published

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 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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-86731

Published

cms

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "craftcms",
                    "product": "cms",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "5.0.0-RC1",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "5.10.12"
                        },
                        {
                            "version": "5.10.12",
                            "status": "unaffected",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON