Modern Events Calendar - SQLi (CVE-2021-24946)

CVE-2021-24946 is a critical vulnerability in the Modern Events Calendar Lite WordPress plugin that enables unauthenticated attackers to perform SQL injection by exploiting improper handling of a parameter in a specific AJAX action.

CrowdSec has been tracking this vulnerability and its exploits since 12th of February 2025.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2021-24946 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-2021-24946 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2021-24946 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Observed exploitation attempts are characterized by requests made to URLs containing /wp-admin/admin-ajax.php?action=mec_load_single_page&time=, where attackers attempt direct SQL injection through the vulnerable parameter.