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CVE-2025-61733: Authentication Bypass Vulnerability in Apache Kylin

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Overview

The following report presents a detailed analysis of a discovered vulnerability, CVE-2025-61733, which affects Apache Kylin versions from 4.0.0 through 5.0.2. The vulnerability is of significance as it allows an attacker to bypass authentication, leading to potential system compromise or data leakage. With a high CVSS severity score of 7.5, it’s essential for users to take action to mitigate the risk.

Vulnerability Summary

CVE ID: CVE-2025-61733
Severity: High (7.5 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and data leakage

Affected Products

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Product | Affected Versions

Apache Kylin | 4.0.0 through 5.0.2

How the Exploit Works

The vulnerability arises due to an oversight in the authentication mechanism in Apache Kylin, which allows the attacker to bypass authentication using an alternate path or channel. As a result, an unauthenticated user can gain unauthorized access to the system, potentially leading to system compromise or data leakage.

Conceptual Example Code

Here’s a conceptual demonstration of how a malicious actor might exploit this vulnerability:

GET /vulnerable/path HTTP/1.1
Host: target.example.com
{ "authentication_bypass": "true" }

In the above example, the attacker attempts to access a vulnerable path on the target system using an HTTP GET request. The authentication_bypass parameter is set to true, exploiting the vulnerability in Apache Kylin’s authentication mechanism, thereby allowing unauthorized access to the system.
It’s important to note that this is a conceptual demonstration and the actual exploit may differ based on the specific environment, system configurations, and the version of Apache Kylin installed.
Users are recommended to upgrade to Apache Kylin version 5.0.3, which contains a patch for this vulnerability. Alternatively, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. However, these are not long-term solutions and upgrading the software to the patched version remains the most effective way to address the vulnerability.

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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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