CVE-2025-54990 identifies an access control vulnerability in the XWiki AdminTools application, specifically in versions prior to 1.1. The issue stems from incorrect default permissions (CWE-276) that allow users without administrative privileges to access the AdminTools.SpammedPages page. While these non-admin users cannot view any actual data on the page, the fact that the page is accessible without proper restriction constitutes an information exposure flaw. This could potentially aid attackers in reconnaissance activities by confirming the presence of administrative tools or gathering metadata about the system. The vulnerability does not allow modification or deletion of data, nor does it impact system availability. The flaw was addressed in version 1.1 by restricting view rights to the XWikiAdminGroup only. The vulnerability has a CVSS v3.1 base score of 5.3, reflecting a medium severity level due to its network attack vector, low complexity, no privileges required, and no user interaction needed. No known exploits have been reported in the wild, indicating limited active exploitation. The vulnerability highlights the importance of strict access control policies in web applications, especially those managing administrative functions. Organizations using XWiki AdminTools versions below 1.1 should upgrade promptly or apply the recommended workaround to mitigate exposure.

For European organizations, the impact of CVE-2025-54990 is primarily related to information disclosure and potential reconnaissance by unauthorized users. Although no sensitive data is directly exposed, the ability to access administrative pages without proper permissions could allow attackers to map the administrative interface and plan further attacks. This could be particularly concerning for organizations relying heavily on XWiki for internal documentation, collaboration, or administrative management, as it may reveal the presence of certain administrative functions or configurations. The vulnerability does not directly compromise data integrity or availability, but it lowers the security posture by exposing internal pages. In regulated industries such as finance, healthcare, or government within Europe, even limited information exposure can have compliance implications under GDPR or other data protection laws. Therefore, mitigating this vulnerability is important to maintain confidentiality and reduce attack surface. The lack of known exploits reduces immediate risk but does not eliminate the need for remediation.

To mitigate CVE-2025-54990, European organizations should immediately upgrade XWiki AdminTools to version 1.1 or later, where the issue is patched. If upgrading is not immediately feasible, a practical workaround is to restrict the view rights of the AdminTools space exclusively to the XWikiAdminGroup, ensuring that only authorized administrators can access the AdminTools.SpammedPages page. Administrators should audit current permission settings to confirm no unintended users have view access to administrative pages. Additionally, organizations should monitor access logs for unusual requests to AdminTools pages that could indicate reconnaissance attempts. Implementing web application firewalls (WAFs) with rules to restrict access to administrative URLs can provide an additional layer of defense. Regular security reviews of permission configurations and adherence to the principle of least privilege are recommended to prevent similar issues. Finally, organizations should maintain an up-to-date inventory of XWiki versions deployed to ensure timely patch management.