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. Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2024-4358 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2024-4358 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

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