Low severity · published Nov 18, 2025
CVE-2025-55074
Channel member objects leak read status
3.5
CVSS
0.2%
EPSS
No
On KEV
Description
Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
10.11.0 through 10.11.3; 10.5.0 through 10.5.11 · source: vendor
MS
Mattermost Server · Mattermost
10.5.0 before 10.5.12; 10.11.0 before 10.11.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-55074
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-55074
Vendor Advisory
https://mattermost.com/security-updates
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