beycanpress Account Switcher Plugin up to 1.0.2 on WordPress REST API Endpoint app/RestAPI.php get_user_meta improper authentication

Summaryinfo

A vulnerability was found in beycanpress Account Switcher Plugin up to 1.0.2 on WordPress and classified as critical. The affected element is the function get_user_meta of the file app/RestAPI.php of the component REST API Endpoint. The manipulation results in improper authentication. This vulnerability was named CVE-2026-6456. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in beycanpress Account Switcher Plugin up to 1.0.2 on WordPress. Affected is the function get_user_meta of the file app/RestAPI.php of the component REST API Endpoint. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The Account Switcher plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.0.2. This is due to the `rememberLogin` REST API endpoint using a loose comparison (`!=` instead of `!==`) for secret validation at `app/RestAPI.php:111`, combined with no validation that the secret is non-empty. When a target user has never used the "Remember me" feature, their `asSecret` user meta does not exist, causing `get_user_meta()` to return an empty string. An attacker can send an empty `secret` parameter, which passes the comparison (`'' != ''` is `false`), and the endpoint then calls `wp_set_auth_cookie()` for the target user. Additionally, all REST routes use `permission_callback => '__return_true'` with no capability checks. This makes it possible for authenticated attackers, with Subscriber-level access and above, to switch to any user account including Administrator, ultimately granting themselves full administrative privileges.

The weakness was presented by Ren Voza. The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-6456 since 04/16/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

By approaching the search of inurl:app/RestAPI.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.0.2 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• beycanpress

Name

• Account Switcher Plugin

Version

• 1.0.0
• 1.0.1
• 1.0.2

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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