Low severity · published Dec 17, 2025
CVE-2025-13321
Mattermost Desktop App logging sensitive information and fails to clear data on server deletion
3.3
CVSS
0.1%
EPSS
No
On KEV
Description
Mattermost Desktop App versions <6.0.0 fail to sanitize sensitive information from Mattermost logs and clear data on server deletion which allows an attacker with access to the users system to gain access to potentially sensitive information via reading the application logs.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
through 6.0.0 · source: vendor
MD
Mattermost Desktop · Mattermost
before 6.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-13321
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-13321
Vendor Advisory
https://mattermost.com/security-updates
More from Mattermost
9.9
CVE-2026-4858
Path traversal in integration action URL leading to arbitrary API execution via system admin’s auth token.
9.9
CVE-2025-12421
Account Takeover via Code Exchange Endpoint
9.9
CVE-2025-12419
Account takeover on OAuth/OpenID-enabled servers
9.9
CVE-2025-4981
Path Traversal Leading to RCE by Any Authenticated Mattermost User
9.6
CVE-2024-39777
Malicious remote can invite itself to an arbitrary local channel