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      <title>CVE-2026-86731 — Craft CMS 5.0.0-RC1 before 5.10.12 Permission Escalation via UsersController</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-86731</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; craftcms cms&lt;/p&gt;
&lt;p&gt;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&amp;#39;s password. The issue is fixed in Craft CMS 5.10.12.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; craftcms cms&lt;/p&gt;
&lt;p&gt;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&amp;#39;s password. The issue is fixed in Craft CMS 5.10.12.&lt;/p&gt;</content:encoded>
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