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.

Data from the CrowdSec community indicates that exploitation of CVE-2024-4358 is highly selective and intelligence-driven. Threat actors use advanced reconnaissance and carefully choose their targets, often as part of sophisticated campaigns or advanced persistent threat operations. CrowdSec network telemetry also shows that exploitation of CVE-2024-4358 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.

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