Vulnerability CVE-2023-2546
Published: 2023-06-06

Description:
The WP User Switch plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 1.0.2. This is due to incorrect authentication checking in the 'wpus_allow_user_to_admin_bar_menu' function with the 'wpus_who_switch' cookie value. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the username.

 References:
https://www.wordfence.com/threat-intel/vulnerabilities/id/e89d912d-fa7a-4fb1-8872-95fa861c21ca?source=cve
https://plugins.trac.wordpress.org/changeset/2921182/wp-user-switch/trunk/inc/functions.php
https://plugins.trac.wordpress.org/browser/wp-user-switch/trunk/inc/functions.php?rev=2237142#L33
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