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TI-2025-08321 Aliases CVE-2025-9079GHSA-qx3f-6vq3-8j8m

Admin RCE via prepackaged plugins by way of misconfigured imports directory

Priority LOW 38CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00642 51st percentileScored 2026-11-07
Fix Fixed Mattermost (Mattermost): 10.11.0, 10.8.4, 10.5.9 +3github.com/mattermost/mattermost-server (Go): 10.8.4, 10.5.9, 9.11.18 +2+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MattermostMattermost10.8.0 – 10.8.3; 10.5.0 – 10.5.8; 9.11.0 – 9.11.17; 10.10.0 – 10.10.1; 10.9.0 – 10.9.310.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.2, 10.9.4Patch availableCNA
—github.com/mattermost/mattermost-server (Go)10.8.0 to before 10.8.410.8.4Patch availableGHSA-qx3f-6vq3-8j8m
—github.com/mattermost/mattermost-server (Go)10.5.0 to before 10.5.910.5.9Patch availableGHSA-qx3f-6vq3-8j8m
—github.com/mattermost/mattermost-server (Go)9.11.0 to before 9.11.189.11.18Patch availableGHSA-qx3f-6vq3-8j8m
—github.com/mattermost/mattermost-server (Go)10.10.0 to before 10.10.210.10.2Patch availableGHSA-qx3f-6vq3-8j8m
—github.com/mattermost/mattermost-server (Go)10.9.0 to before 10.9.410.9.4Patch availableGHSA-qx3f-6vq3-8j8m
—github.com/mattermost/mattermost/server/v8 (Go)before 8.0.0-20250707221302-a8fa77f107ef8.0.0-20250707221302-a8fa77f107efPatch availableGHSA-qx3f-6vq3-8j8m
  • Mattermost VendorMattermost Affected 10.8.0 – 10.8.3; 10.5.0 – 10.5.8; 9.11.0 – 9.11.17; 10.10.0 – 10.10.1; 10.9.0 – 10.9.3 Fixed in 10.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.2, 10.9.4 Patch available CNA
  • github.com/mattermost/mattermost-server (Go) Vendor— Affected 10.8.0 to before 10.8.4 Fixed in 10.8.4 Patch available GHSA-qx3f-6vq3-8j8m
  • github.com/mattermost/mattermost-server (Go) Vendor— Affected 10.5.0 to before 10.5.9 Fixed in 10.5.9 Patch available GHSA-qx3f-6vq3-8j8m
  • github.com/mattermost/mattermost-server (Go) Vendor— Affected 9.11.0 to before 9.11.18 Fixed in 9.11.18 Patch available GHSA-qx3f-6vq3-8j8m
  • github.com/mattermost/mattermost-server (Go) Vendor— Affected 10.10.0 to before 10.10.2 Fixed in 10.10.2 Patch available GHSA-qx3f-6vq3-8j8m
  • github.com/mattermost/mattermost-server (Go) Vendor— Affected 10.9.0 to before 10.9.4 Fixed in 10.9.4 Patch available GHSA-qx3f-6vq3-8j8m
  • github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected before 8.0.0-20250707221302-a8fa77f107ef Fixed in 8.0.0-20250707221302-a8fa77f107ef Patch available GHSA-qx3f-6vq3-8j8m

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*9.11.0 to before 9.11.18; 10.5.0 to before 10.5.9; 10.8.0 to before 10.8.4; 10.9.0 to before 10.9.4; 10.10.0 to before 10.10.2VulnerableMattermost
  • cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* Versions 9.11.0 to before 9.11.18; 10.5.0 to before 10.5.9; 10.8.0 to before 10.8.4; 10.9.0 to before 10.9.4; 10.10.0 to before 10.10.2 Vulnerable ·Mattermost

Remediation

  • Fix · CNA Mattermost (Mattermost) Fixed in 10.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.2, 10.9.4
  • Fix · GHSA-qx3f-6vq3-8j8m github.com/mattermost/mattermost-server (Go) Fixed in 10.8.4 Advisory →
  • Fix · GHSA-qx3f-6vq3-8j8m github.com/mattermost/mattermost-server (Go) Fixed in 10.5.9 Advisory →
  • Fix · GHSA-qx3f-6vq3-8j8m github.com/mattermost/mattermost-server (Go) Fixed in 9.11.18 Advisory →
  • Fix · GHSA-qx3f-6vq3-8j8m github.com/mattermost/mattermost-server (Go) Fixed in 10.10.2 Advisory →
  • Fix · GHSA-qx3f-6vq3-8j8m github.com/mattermost/mattermost-server (Go) Fixed in 10.9.4 Advisory →
  • Fix · GHSA-qx3f-6vq3-8j8m github.com/mattermost/mattermost/server/v8 (Go) Fixed in 8.0.0-20250707221302-a8fa77f107ef Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-9079
  2. 2026-10-03 Alias added: GHSA-qx3f-6vq3-8j8m
  3. 2026-10-21 EPSS moved to the 50th–90th percentile

References

Advisory 2

Other 8

  • TI-2025-18933 Arbitrary file read in Mattermost Boards via import & export board archive CVSS 3.1CRITICAL 9.9
  • TI-2025-04465 Path Traversal Leading to RCE by Any Authenticated Mattermost User CVSS 3.1CRITICAL 9.9
  • TI-2017-14068 An issue was discovered in Mattermost Server before 3.6.2. CVSS 3.1CRITICAL 9.8
  • TI-2017-14060 An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7. CVSS 3.1CRITICAL 9.8
  • TI-2017-14048 An issue was discovered in Mattermost Server before 4.1.0, 4.0.4, and 3.10.3. CVSS 3.1CRITICAL 9.8
  • TI-2025-14360 Arbitrary file read via block duplication in Mattermost Boards CVSS 3.1CRITICAL 9.9
See all 505 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences