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CVE-2025-49125: Authentication Bypass Vulnerability in Apache Tomcat

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Overview

The CVE-2025-49125 vulnerability is a critical security flaw identified in Apache Tomcat, a widely used web server software. The vulnerability allows potential attackers to bypass authentication and gain unauthorized access to protected resources. This flaw can lead to significant security breaches, potentially compromising system integrity or resulting in data leakage.

Vulnerability Summary

CVE ID: CVE-2025-49125
Severity: High (7.5 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage

Affected Products

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Product | Affected Versions

Apache Tomcat | 11.0.0-M1 through 11.0.7
Apache Tomcat | 10.1.0-M1 through 10.1.41
Apache Tomcat | 9.0.0.M1 through 9.0.105

How the Exploit Works

The vulnerability lies in the ability to access PreResources or PostResources mounted in areas other than the root of the web application via an unexpected path. This unexpected path may not be protected by the same security constraints as the expected path, allowing bypassing of these security constraints.

Conceptual Example Code

The following pseudocode illustrates a potential exploit of this vulnerability:

GET /unprotected-path/resource HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "access_request": "resource_data" }

In this example, an attacker sends a GET request to an unprotected path (unlike the expected secure path), potentially gaining access to sensitive resources. It is worth noting that the actual exploit would depend on the specific configurations and security measures in place on the target server.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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