CVE-2026-6456 Account Switcher <= 1.0.2 - Authenticated (Subscriber+) Authentication Bypass to Privilege Escalation
Authenticated attackers can bypass authentication via loose comparison flaws to escalate privileges to Administrator in the Account Switcher plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6456?
CVE-2026-6456 is a high-severity authentication bypass vulnerability in beycanpress Account Switcher, published on 20 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-287
Which versions are affected by CVE-2026-6456?
How do I fix CVE-2026-6456?
No fix has been published for CVE-2026-6456 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-6456 being exploited?
There is no known exploitation of CVE-2026-6456 in the wild and no public exploit code.
Sources
Also known as GHSA-wrmc-3xq2-8pf7.