CVE-2023-51704 : Exploit Details and Defense Strategies

An issue was discovered in MediaWiki before 1.35.14, 1.36.x through 1.39.x before 1.39.6, and 1.40.x before 1.40.2. This vulnerability exists in includes/logging/RightsLogFormatter.php, where group-*-member messages can lead to XSS on Special:log/rights.

Understanding CVE-2023-51704

This section provides insights into the nature and impact of the vulnerability.

What is CVE-2023-51704?

CVE-2023-51704 is a security vulnerability identified in MediaWiki versions prior to 1.35.14, 1.39.6, and 1.40.2. Specifically, the issue lies in RightsLogFormatter.php, potentially enabling XSS attacks via certain group-related messages on Special:log/rights.

The Impact of CVE-2023-51704

Exploitation of this vulnerability could allow malicious actors to execute arbitrary scripts in the context of an authenticated user viewing the log of rights changes. This could lead to unauthorized actions or theft of sensitive data.

Technical Details of CVE-2023-51704

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability arises due to improper handling of group-*-member messages, creating a scenario where XSS attacks can be injected in Special:log/rights, compromising user security.

Affected Systems and Versions

MediaWiki versions before 1.35.14, 1.39.6, and 1.40.2 are affected by this vulnerability, potentially impacting systems running these versions.

Exploitation Mechanism

By crafting malicious group-related messages, threat actors can exploit the vulnerability to inject and execute unauthorized scripts in the context of a user viewing log entries on Special:log/rights.

Mitigation and Prevention

Learn about the steps to address and prevent CVE-2023-51704.

Immediate Steps to Take

Users and system administrators are advised to update their MediaWiki installations to the latest patched versions, namely 1.35.14, 1.39.6, or 1.40.2, to mitigate the risk of exploitation.

Long-Term Security Practices

Implementing strict input validation and output encoding mechanisms within the application can help prevent similar XSS vulnerabilities in the future.

Patching and Updates

Regularly monitor security advisories and apply patches promptly to stay protected against emerging threats.