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CVE-2025-48050: DOMPurify Pathname Vulnerability Leading to Potential System Compromise

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Overview

The vulnerability, identified as CVE-2025-48050, resides in the DOMPurify library, up until version 3.2.5, and could potentially lead to system compromise or data leakage. It is significant due to the widespread use of the DOMPurify library, and the potential for malicious actors to exploit it for unauthorized system access.

Vulnerability Summary

CVE ID: CVE-2025-48050
Severity: High (7.5 CVSS)
Attack Vector: Local
Privileges Required: Low
User Interaction: Required
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

DOMPurify | Up to and including version 3.2.5

How the Exploit Works

The vulnerability lies in the scripts/server.js file of DOMPurify, where it does not correctly ensure that a pathname is located under the current working directory. This means that a malicious actor could potentially manipulate the pathname to gain unauthorized access to parts of the system.

Conceptual Example Code

Consider the following conceptual example of how the vulnerability might be exploited. This is a pseudocode representation and not an actual exploit:

let malicious_path = "/../../etc/passwd";
let server = require("dompurify/scripts/server.js");
server.start({
root: "/var/www/app",
path: malicious_path
});

In this example, the malicious path (‘/../../etc/passwd’) could potentially lead to unauthorized access to sensitive system files.

Mitigation Guidance

Users are advised to apply the vendor patch as soon as it is available. In the meantime, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation measure. Users should also consider implementing least privilege principles and input validation to further protect against such vulnerabilities.

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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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