CVE-2025-67567 is a vulnerability identified in the uixthemes Sober product, affecting all versions up to and including 3.5.11. The issue involves the exposure of sensitive system information to unauthorized actors, classified as an information disclosure vulnerability. Specifically, attackers can remotely retrieve embedded sensitive data without requiring any privileges or user interaction, indicating a network-exploitable flaw with low attack complexity. The vulnerability does not allow modification of data or disruption of service, limiting its impact to confidentiality breaches. The affected component is part of the uixthemes Sober theme system, which is used in web environments to manage user interface themes. The vulnerability was published on December 9, 2025, and currently, no public exploits or active exploitation campaigns have been reported. The CVSS v3.1 base score is 5.3, reflecting a medium severity level due to the confidentiality impact and ease of exploitation. The vulnerability could enable attackers to gather sensitive system information that may facilitate further targeted attacks or reconnaissance activities. No patches or mitigation links were provided at the time of publication, indicating the need for vendor response and user vigilance.

For European organizations, the primary impact of CVE-2025-67567 is the unauthorized disclosure of sensitive system information, which could include configuration details, internal paths, or other embedded data that attackers can leverage for further exploitation. While the vulnerability does not directly compromise system integrity or availability, the leaked information could aid attackers in crafting more effective attacks such as privilege escalation, lateral movement, or targeted phishing campaigns. Organizations in sectors with high reliance on web-based UI theming solutions, such as digital agencies, e-commerce platforms, and content management systems, may be particularly at risk. The exposure of sensitive data could also have compliance implications under GDPR if personal or operational data is indirectly revealed. Since exploitation requires no authentication and no user interaction, the threat surface is broad, especially for externally accessible systems. However, the absence of known exploits in the wild reduces immediate risk, though proactive mitigation is advised to prevent future exploitation.

1. Monitor vendor communications closely for official patches or updates addressing CVE-2025-67567 and apply them promptly once available. 2. In the absence of patches, restrict network access to the Sober theme management interfaces using firewalls or network segmentation to limit exposure to trusted internal users only. 3. Conduct thorough audits of systems running uixthemes Sober to identify affected versions and isolate vulnerable instances. 4. Implement web application firewalls (WAFs) with custom rules to detect and block suspicious requests attempting to retrieve sensitive embedded data. 5. Review and minimize the amount of sensitive information embedded within themes or configuration files to reduce the potential data exposed if exploited. 6. Enhance monitoring and logging around theme management endpoints to detect unusual access patterns indicative of reconnaissance or exploitation attempts. 7. Educate development and operations teams about the risks associated with exposing sensitive data in UI themes and enforce secure coding practices.