CVE-2025-2424: 
Chainguard vulnerability analysis and mitigation

Mattermost versions 10.5.x <= 10.5.1 and 9.11.x <= 9.11.9 contain a security vulnerability where the system fails to check if a file has been deleted when creating a bookmark. This vulnerability was discovered and disclosed on April 14, 2025, affecting specific versions of the Mattermost collaboration platform (NVD).

The vulnerability is related to improper authorization (CWE-863) in the bookmark creation functionality. When creating a bookmark, the system does not properly verify if the referenced file has been deleted, which could lead to unauthorized access to file metadata. The vulnerability has been assigned a CVSS v3.1 base score of 3.1 (LOW) with the vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N, indicating network accessibility with high attack complexity, requiring low privileges, and potentially resulting in low confidentiality impact (NVD).

If exploited, this vulnerability allows an attacker who knows the IDs of deleted files to obtain metadata of those files through bookmark creation. The impact is limited to unauthorized access to file metadata, with no direct impact on system integrity or availability (NVD).

Users should upgrade to versions newer than 10.5.1 for the 10.5.x series or versions newer than 9.11.9 for the 9.11.x series to address this vulnerability (NVD, Mattermost Security).