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 10th of March 2025.

CrowdSec network observations suggest that most exploitation of CVE-2021-24946 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental. CrowdSec network telemetry also shows that exploitation of CVE-2021-24946 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.

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.