WooCommerce - Authentication Bypass (CVE-2023-28121)

CVE-2023-28121 is a critical vulnerability in the WooCommerce Payments plugin for WordPress that allows unauthenticated attackers to impersonate elevated users, including administrators, enabling full site takeover.

CrowdSec has been tracking this vulnerability and its exploits since 15th of December 2023.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2023-28121 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2023-28121 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2023-28121 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

The exploits don't target a specific endpoint, instead the vulnerability is caused by a query parameter that can be attached to any request.