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CVE-2025-48391: Security Vulnerability in the Permission Checks of JetBrains YouTrack API

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Overview

The identified vulnerability CVE-2025-48391 exposes a critical security flaw in the JetBrains YouTrack application versions prior to 2025.1.76253. The flaw involves a missing permission check in the API, which could potentially allow unauthorized deletion of issues. The vulnerability is significant as it could lead to system compromise and data leakage.

Vulnerability Summary

CVE ID: CVE-2025-48391
Severity: High (CVSS: 7.7)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Unauthorized issue deletion, potential system compromise, and data leakage

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Product | Affected Versions

JetBrains YouTrack | Before 2025.1.76253

How the Exploit Works

The vulnerability exists due to the lack of proper permission checks in the API of JetBrains YouTrack. An attacker could exploit this flaw by sending a specifically crafted request to the API. The application would then process the request without verifying the required permissions, allowing the attacker to delete issues.

Conceptual Example Code

Here is a conceptual example of how the vulnerability might be exploited. This is a HTTP request, where the attacker sends a DELETE request to the API endpoint responsible for issue management.

DELETE /api/issues/{issueId} HTTP/1.1
Host: target.example.com
Content-Type: application/json
Authorization: Bearer {token}
{ "issueId": "12345" }

In this example, the attacker is trying to delete an issue with the ID of 12345 by sending a DELETE request to the `/api/issues/{issueId}` endpoint. The server processes the request without validating the permissions of the user, leading to unauthorized deletion of issues.

Mitigation Guidance

JetBrains has released a patch to address this vulnerability. Users are strongly advised to update their JetBrains YouTrack to version 2025.1.76253 or later. If unable to apply the patch immediately, users can implement a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary mitigation measure to monitor and block malicious requests.

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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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