CVE-2025-58012 is a vulnerability classified under CWE-639, which pertains to Authorization Bypass Through User-Controlled Key in the Alex Content Mask product. This vulnerability arises due to incorrectly configured access control security levels, allowing an attacker with certain privileges to bypass authorization mechanisms by manipulating user-controlled keys. The affected product is Alex Content Mask, up to version 1.8.5.2, although specific affected versions are not detailed. The vulnerability enables an attacker with high privileges (PR:H) to exploit the system remotely (AV:N) without requiring user interaction (UI:N). The impact is limited to integrity and availability, with no confidentiality loss reported. The CVSS v3.1 base score is 3.8, indicating a low severity. The vulnerability does not appear to be exploited in the wild yet, and no patches or exploit code are currently available. The core technical issue is that the access control mechanism relies on keys that can be influenced or controlled by users, which can lead to bypassing intended authorization checks, potentially allowing unauthorized modification or disruption of content masking functions within the application.

For European organizations using Alex Content Mask, this vulnerability could result in unauthorized modification or disruption of content masking controls, potentially affecting data integrity and availability of masked content. While confidentiality is not directly impacted, the ability to bypass authorization could undermine trust in data handling processes, especially in sectors with strict data protection regulations such as GDPR. Organizations relying on this product for content filtering or masking may experience service interruptions or unauthorized content alterations, which could affect compliance and operational continuity. However, the requirement for high privileges to exploit this vulnerability limits the risk to insider threats or attackers who have already gained elevated access, reducing the likelihood of widespread external exploitation.

European organizations should implement strict privilege management to ensure that only trusted users have high-level access required to exploit this vulnerability. Conduct thorough audits of access control configurations within Alex Content Mask to identify and correct any misconfigurations related to user-controlled keys. Employ network segmentation and monitoring to detect unusual activities from privileged accounts. Since no patches are currently available, consider applying compensating controls such as enhanced logging and alerting on authorization bypass attempts. Engage with the vendor for updates or patches and plan for timely deployment once available. Additionally, review and strengthen internal policies around key management and access control to prevent similar issues. Regularly update and test incident response plans to quickly address potential exploitation scenarios.