High severity · published Sep 19, 2025
CVE-2025-9079
Admin RCE via prepackaged plugins by way of misconfigured imports directory
7.2
CVSS
0.6%
EPSS
No
On KEV
Description
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to validate import directory path configuration which allows admin users to execute arbitrary code via malicious plugin upload to prepackaged plugins directory
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
10.8.0 through 10.8.3; 10.5.0 through 10.5.8; 9.11.0 through 9.11.17; 10.10.0 through 10.10.1; 10.9.0 through 10.9.3 · source: vendor
MS
Mattermost Server · Mattermost
9.11.0 before 9.11.18; 10.5.0 before 10.5.9; 10.8.0 before 10.8.4; 10.9.0 before 10.9.4; 10.10.0 before 10.10.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-9079
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-9079
Vendor Advisory
https://mattermost.com/security-updates
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