danbilabs Advanced Members for ACF Plugin up to 1.3.0 on WordPress Password class-user-password.php pre_update_value acf[_amem_local_user_password] privileges management

Summaryinfo

A vulnerability identified as critical has been detected in danbilabs Advanced Members for ACF Plugin up to 1.3.0. Affected is the function pre_update_value of the file acf/fields/class-user-password.php of the component Password. This manipulation of the argument acf[_amem_local_user_password] causes privileges management. This vulnerability is handled as CVE-2026-116624. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in danbilabs Advanced Members for ACF Plugin up to 1.3.0. It has been declared as critical. Affected by this vulnerability is the function pre_update_value of the file acf/fields/class-user-password.php of the component Password. The manipulation of the argument acf[_amem_local_user_password] with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The Advanced Members for ACF plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.3.0 via the `acf[_amem_local_user_password]` parameter of the `[advanced-members-account-password]` shortcode form submission. This is due to a PHP operator-precedence bug in the `pre_update_value` function of `acf/fields/class-user-password.php` that assigns boolean `true` instead of the resolved user ID to `$user_id`, causing the `_can_edit()` authorization check to pass for any logged-in user via PHP loose equality, and causing `wp_update_user()` to cast `'ID' => true` to integer `1` — unconditionally targeting the primary administrator account. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the password of user ID 1 (the site's primary administrator) with an attacker-chosen value, granting full administrative access to the site. The intended exclusion guard in `Account::process` that strips the password field before saving is defeated because `amem_save_all_fields()` re-reads the full field list from `amem()->submission` and silently overwrites the caller-supplied excluded fields array with an empty array, ensuring the password field is always processed.

The advisory is shared at wordfence.com. This vulnerability is known as CVE-2026-116624 since 10/26/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/06/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

By approaching the search of inurl:acf/fields/class-user-password.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• danbilabs

Name

• Advanced Members for ACF Plugin

Version

• 1.0
• 1.1
• 1.2
• 1.3.0

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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