CVE-2023-22910 : What You Need to Know

This CVE was published on January 20, 2023, and relates to an issue found in MediaWiki versions before 1.35.9, 1.36.x through 1.38.x before 1.38.5, and 1.39.x before 1.39.1. The vulnerability allows for XSS in Wikibase date formatting via wikibase-time-precision-* fields, enabling JavaScript execution by staff/admin users without intentionally having the editsitejs capability.

Understanding CVE-2023-22910

This section will delve into the details of CVE-2023-22910, including what it entails and its potential impact.

What is CVE-2023-22910?

CVE-2023-22910 is a security vulnerability discovered in MediaWiki that exposes an XSS issue in Wikibase date formatting. This flaw can be exploited by authorized staff or admin users, leading to potential JavaScript execution.

The Impact of CVE-2023-22910

The impact of this CVE is significant as it can be leveraged by malicious actors to execute arbitrary JavaScript code within the context of affected users. This can lead to various security risks such as data theft, unauthorized actions, and potentially compromising the entire system.

Technical Details of CVE-2023-22910

In this section, we will explore the technical aspects of CVE-2023-22910, including the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability in MediaWiki versions prior to 1.35.9, 1.36.x through 1.38.x before 1.38.5, and 1.39.x before 1.39.1 allows for XSS attacks via Wikibase date formatting fields, specifically the wikibase-time-precision-* fields. This enables the execution of JavaScript code by certain privileged users.

Affected Systems and Versions

All versions of MediaWiki before 1.35.9, 1.36.x through 1.38.x before 1.38.5, and 1.39.x before 1.39.1 are susceptible to this XSS vulnerability in Wikibase date formatting.

Exploitation Mechanism

The vulnerability can be exploited by authorized staff or admin users who do not intentionally possess the editsitejs capability. By inserting malicious code into wikibase-time-precision-* fields, attackers can trigger unauthorized JavaScript execution.

Mitigation and Prevention

To address CVE-2023-22910 and prevent potential exploitation, immediate steps need to be taken to secure affected systems and establish long-term security practices.

Immediate Steps to Take

Update MediaWiki to the patched versions (1.35.9, 1.38.5, 1.39.1) to mitigate the XSS vulnerability.
Regularly monitor and audit user permissions to minimize the risk of unauthorized JavaScript execution.
Educate staff and admin users on safe coding practices to prevent XSS attacks.

Long-Term Security Practices

Implement a robust security policy that includes routine security assessments and vulnerability scans.
Stay informed about security updates and patches released by MediaWiki to quickly address any new vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates provided by MediaWiki to mitigate known vulnerabilities and enhance the overall security posture of the system.