Progress Telerik Report Server - Authentication Bypass (CVE-2024-4358)

CVE-2024-4358 is a high-severity vulnerability in Progress Telerik Report Server that allows unauthenticated attackers to bypass authentication and gain access to restricted functionality when the software is deployed on IIS.

CrowdSec has been tracking this vulnerability and its exploits since 10th of March 2025.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2024-4358 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. CrowdSec data also reveals a clear uptick in attacks involving CVE-2024-4358 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.

Exploitation attempts often involve requests to endpoints such as /startup/register or /report/index.