Medium severity · published Feb 14, 2025
CVE-2025-0503
Leaked User IDs and Metadata of Deleted DMs
5.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
9.11.0 through 9.11.6 · source: vendor
MS
Mattermost Server · Mattermost
9.11.0 before 9.11.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-0503
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-0503
Vendor Advisory
https://mattermost.com/security-updates
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