getgrav Login Plugin up to 3.8.11 Authenticated Profile Self-Update processUserProfile groups/access privileges management

Summaryinfo

A vulnerability has been found in getgrav Login Plugin up to 3.8.11 and classified as critical. The impacted element is the function processUserProfile of the component Authenticated Profile Self-Update Handler. The manipulation of the argument groups/access leads to privileges management. This vulnerability is documented as CVE-2026-65603. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in getgrav Login Plugin up to 3.8.11. It has been rated as critical. This issue affects the function processUserProfile of the component Authenticated Profile Self-Update Handler. The manipulation of the argument groups/access with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Grav Login plugin (grav-plugin-login) versions <= 3.8.11 contain a privilege escalation flaw in the authenticated profile self-update handler (processUserProfile(), the update_user task). Unlike the registration handler, this handler does not strip privilege fields ('groups','access') from user-submitted form data before persisting them. When an administrator has added 'groups' and/or 'access' to plugins.login.user_registration.fields and the default 'regular'/DataUser account backend is in use, a low-privilege authenticated user can POST crafted profile form data (e.g. access[admin][super]=true) to escalate to super-admin, enabling admin panel access, scheduler abuse (RCE), and Twig evaluation. Fixed in 3.8.12.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-65603 since 07/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 3.8.12 eliminates this vulnerability.

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Productinfo

Vendor

• getgrav

Name

• Login Plugin

Version

• 3.8.0
• 3.8.1
• 3.8.2
• 3.8.3
• 3.8.4
• 3.8.5
• 3.8.6
• 3.8.7
• 3.8.8
• 3.8.9
• 3.8.10
• 3.8.11

CPE 2.3info

• 🔒
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CPE 2.2info

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Entryinfo

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