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TI-2025-07689 Aliases CVE-2025-8402GHSA-h469-4fcf-p23h

Nil pointer dereference in bulk import crashes server

Priority LOW 22CWE-1287Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-476.

Summary

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00321 25th 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, 10.9.4 +2+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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; 10.9.0 – 10.9.310.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.1, 10.9.4Patch availableCNA
—github.com/mattermost/mattermost-server (Go)10.8.0 to before 10.8.410.8.4Patch availableGHSA-h469-4fcf-p23h
—github.com/mattermost/mattermost-server (Go)10.5.0 to before 10.5.910.5.9Patch availableGHSA-h469-4fcf-p23h
—github.com/mattermost/mattermost-server (Go)10.9.0 to before 10.9.410.9.4Patch availableGHSA-h469-4fcf-p23h
—github.com/mattermost/mattermost-server (Go)10.10.0 to before 10.10.110.10.1Patch availableGHSA-h469-4fcf-p23h
—github.com/mattermost/mattermost/server/v8 (Go)before 8.0.0-20250708173752-d6b35c41f0ae58.0.0-20250708173752-d6b35c41f0ae5Patch availableGHSA-h469-4fcf-p23h
—github.com/mattermost/mattermost-server (Go)9.11.0 to before 9.11.189.11.18Patch availableGHSA-h469-4fcf-p23h
—github.com/mattermost/mattermost-server/v5 (Go)up to 5.39.3—No fix listedGHSA-h469-4fcf-p23h
—github.com/mattermost/mattermost-server/v6 (Go)up to 6.7.2—No fix listedGHSA-h469-4fcf-p23h
  • Mattermost VendorMattermost Affected 10.8.0 – 10.8.3; 10.5.0 – 10.5.8; 9.11.0 – 9.11.17; 10.10.0; 10.9.0 – 10.9.3 Fixed in 10.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.1, 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-h469-4fcf-p23h
  • github.com/mattermost/mattermost-server (Go) Vendor— Affected 10.5.0 to before 10.5.9 Fixed in 10.5.9 Patch available GHSA-h469-4fcf-p23h
  • github.com/mattermost/mattermost-server (Go) Vendor— Affected 10.9.0 to before 10.9.4 Fixed in 10.9.4 Patch available GHSA-h469-4fcf-p23h
  • github.com/mattermost/mattermost-server (Go) Vendor— Affected 10.10.0 to before 10.10.1 Fixed in 10.10.1 Patch available GHSA-h469-4fcf-p23h
  • github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected before 8.0.0-20250708173752-d6b35c41f0ae5 Fixed in 8.0.0-20250708173752-d6b35c41f0ae5 Patch available GHSA-h469-4fcf-p23h
  • github.com/mattermost/mattermost-server (Go) Vendor— Affected 9.11.0 to before 9.11.18 Fixed in 9.11.18 Patch available GHSA-h469-4fcf-p23h
  • github.com/mattermost/mattermost-server/v5 (Go) Vendor— Affected up to 5.39.3 Fixed in — No fix listed GHSA-h469-4fcf-p23h
  • github.com/mattermost/mattermost-server/v6 (Go) Vendor— Affected up to 6.7.2 Fixed in — No fix listed GHSA-h469-4fcf-p23h

CPE configurations NVD · 2

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 10.9.4VulnerableMattermost
cpe:2.3:a:mattermost:mattermost_server:10.10.0:-:*:*:*:*:*:*10.10.0VulnerableMattermost
  • 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 Vulnerable ·Mattermost
  • cpe:2.3:a:mattermost:mattermost_server:10.10.0:-:*:*:*:*:*:* Versions 10.10.0 Vulnerable ·Mattermost

Remediation

  • Fix · CNA Mattermost (Mattermost) Fixed in 10.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.1, 10.9.4
  • Fix · GHSA-h469-4fcf-p23h github.com/mattermost/mattermost-server (Go) Fixed in 10.8.4 Advisory →
  • Fix · GHSA-h469-4fcf-p23h github.com/mattermost/mattermost-server (Go) Fixed in 10.5.9 Advisory →
  • Fix · GHSA-h469-4fcf-p23h github.com/mattermost/mattermost-server (Go) Fixed in 10.9.4 Advisory →
  • Fix · GHSA-h469-4fcf-p23h github.com/mattermost/mattermost-server (Go) Fixed in 10.10.1 Advisory →
  • Fix · GHSA-h469-4fcf-p23h github.com/mattermost/mattermost/server/v8 (Go) Fixed in 8.0.0-20250708173752-d6b35c41f0ae5 Advisory →
  • Fix · GHSA-h469-4fcf-p23h github.com/mattermost/mattermost-server (Go) Fixed in 9.11.18 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-8402
  2. 2026-10-03 Alias added: GHSA-h469-4fcf-p23h

References

Advisory 2

Other 2

  • 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