CVE-2025-53492 is a security vulnerability classified under CWE-79, which pertains to improper neutralization of input during web page generation, commonly known as Cross-site Scripting (XSS). This specific vulnerability affects the MintyDocs Extension of the Wikimedia Foundation's Mediawiki software, versions 1.43.x prior to 1.43.2. The vulnerability allows an attacker to inject and store malicious scripts within the web content generated by the MintyDocs Extension. When other users access the affected pages, the malicious scripts execute in their browsers, potentially leading to unauthorized actions such as session hijacking, defacement, or redirection to malicious sites. The vulnerability is categorized as a stored XSS, meaning the malicious payload is permanently stored on the server and served to users, increasing the risk and persistence of the attack. The CVSS v3.1 base score is 3.7, indicating a low severity primarily due to the high attack complexity and no requirement for user interaction or privileges. The attack vector is network-based, and the scope is unchanged, affecting confidentiality with no impact on integrity or availability. No known exploits are currently reported in the wild, and no patches have been linked yet, suggesting that remediation is pending or in progress. The vulnerability arises from insufficient input sanitization or encoding in the MintyDocs Extension during web page generation, allowing malicious HTML or JavaScript to be injected and rendered in user browsers.

For European organizations using Mediawiki with the MintyDocs Extension, this vulnerability poses a risk primarily to confidentiality through potential theft of session tokens or sensitive information accessible via the browser context. Although the severity is low, stored XSS can be leveraged in targeted attacks against internal wikis or documentation portals, potentially exposing internal information or enabling lateral movement within networks. Public-facing Mediawiki installations used for collaborative documentation or knowledge sharing could be manipulated to serve malicious content to employees or partners. The impact is heightened in environments where Mediawiki is integrated with single sign-on or contains sensitive operational data. However, the lack of known exploits and the requirement for high attack complexity reduce immediate risk. Organizations relying on Mediawiki for critical documentation should consider the potential for reputational damage and user trust erosion if the vulnerability is exploited.

European organizations should promptly upgrade the MintyDocs Extension to version 1.43.2 or later once available to address this vulnerability. Until a patch is released, administrators should implement strict input validation and output encoding on any user-generated content within the MintyDocs Extension. Employ Content Security Policy (CSP) headers to restrict script execution and reduce the impact of potential XSS payloads. Conduct thorough code reviews and penetration testing focusing on input handling in the MintyDocs Extension. Additionally, monitor web server logs and user reports for unusual activity or unexpected script execution. Disable or restrict the use of the MintyDocs Extension if it is not essential to reduce the attack surface. Educate users about the risks of clicking on suspicious links within internal documentation portals. Finally, maintain up-to-date backups and incident response plans to quickly remediate any exploitation attempts.