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Status published
Low
CVE-2025-0503
Leaked User IDs and Metadata of Deleted DMs
Vulnerability Description
Mattermost versions 9.11.x <= 9.11.6 fail to filter out DMs from the deleted channels endpoint which allows an attacker to infer user IDs and other metadata from deleted DMs if someone had manually marked DMs as deleted in the database.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Devin Binnie
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Affected Vendor
Mattermost
View all reports →Affected Software
Mattermost
Vulnerable Versions:
9.11.0, 10.4.0, 9.11.7
Timeline
Official Publish:
February 14th, 2025
Last Modified:
February 14th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N