CVE-2026-6072 Oliver POS <= 2.4.2.6 - Unauthenticated Authorization Bypass Through User-Controlled Key to 'OliverAuth' Header
Unauthenticated attackers can bypass authentication via type juggling in Oliver POS plugin to access sensitive data and potentially take over the site.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6072?
CVE-2026-6072 is a medium-severity authentication bypass vulnerability in oliverpos Oliver POS – A WooCommerce Point of Sale (POS), published on 20 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Oliver POS – A WooCommerce Point of Sale (POS) plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in all versions up to and including 2.4.2.6. The plugin protects its entire /wp-json/pos-bridge/* REST API namespace through the oliver_pos_rest_authentication() permission callback, which uses a loose PHP comparison (==) to compare the attacker-supplied 'OliverAuth' header value against the 'oliver_pos_authorization_token' option. On fresh installations where the admin has not yet completed the connection flow, this option is unset (get_option returns false). Due to PHP's type juggling, the loose comparison '0' == false evaluates to true, allowing an unauthenticated attacker to bypass authentication by sending 'OliverAuth: 0'. This grants full access to all POS API endpoints, enabling attackers to read user data (including administrator details), update user profiles (including email addresses), and delete non-admin users. An admin account email reset can lead to site takeover.
Weakness: CWE-639
Which versions are affected by CVE-2026-6072?
How do I fix CVE-2026-6072?
No fix has been published for CVE-2026-6072 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-2026-6072 being exploited?
There is no known exploitation of CVE-2026-6072 in the wild and no public exploit code.
Sources
Also known as GHSA-mqwc-jxpp-f3rj.