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Fencer Vulns
high 8.0

CVE-2025-9079 json

Admin RCE via prepackaged plugins by way of misconfigured imports directory

published 2025-09-19 13 mo ago modified 2026-10-19 20 d ago also GHSA-qx3f-6vq3-8j8m , GO-2025-3977 , EUVD-2025-30242

cvss
8.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

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

Patch / fix

  • go github.com/mattermost/mattermost-server 9.11.18, 9.11.18+incompatible, 10.5.9, 10.5.9+incompatible, 10.8.4, 10.8.4+incompatible, 10.9.4, 10.9.4+incompatible, 10.10.2, 10.10.2+incompatible
  • go github.com/mattermost/mattermost/server/v8 8.0.0-20250707221302-a8fa77f107ef
  • Mattermost Mattermost 9.11.18, 10.5.9, 10.8.4, 10.9.4, 10.10.2, 10.11.0
  • govulncheck-vulndb SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 0.0.20251023T162509-150000.1.110.1

suse advisories SUSE-SU-2025:3799-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20250924T192141-1.1

opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2025:15576-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
13 mo ago

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.0 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 8.0 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/mattermost/mattermost-server
>=10.8.0, <10.8.4
>=10.5.0, <10.5.9
>=9.11.0, <9.11.18
>=10.10.0, <10.10.2
>=10.9.0, <10.9.4
>=9.11.0+incompatible, <9.11.18+incompatible
>=10.5.0+incompatible, <10.5.9+incompatible
>=10.8.0+incompatible, <10.8.4+incompatible
>=10.9.0+incompatible, <10.9.4+incompatible
>=10.10.0+incompatible, <10.10.2+incompatible
10.8.4
10.5.9
9.11.18
10.10.2
10.9.4
9.11.18+incompatible
10.5.9+incompatible
10.8.4+incompatible
10.9.4+incompatible
10.10.2+incompatible
go github.com/mattermost/mattermost/server/v8
<8.0.0-20250707221302-a8fa77f107ef
8.0.0-20250707221302-a8fa77f107ef
go github.com/mattermost/mattermost-server/v5
all versions
 no fix listed
go github.com/mattermost/mattermost-server/v6
all versions
 no fix listed

Affected products

  • Mattermost Mattermost

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.