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TI-2024-03902 Aliases CVE-2024-4195GHSA-5fh7-7mw7-mmx5

Improper access control in Mattermost

Priority LOW 14CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-284.

Summary

Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes, which allows an attacker authenticated as a team admin to promote guests to team admins via crafted HTTP requests.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00502 43rd percentileScored 2026-11-07
Fix Partial Mattermost (Mattermost): 9.7.0, 9.6.1, 9.5.3 +1github.com/mattermost/mattermost-server (Go): 9.5.3, 8.1.12Red Hat: 2 without a fix

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
MattermostMattermost9.6.0; 9.5.0 – 9.5.2; 8.1.0 – 8.1.119.7.0, 9.6.1, 9.5.3, 8.1.12Patch availableCNA
—github.com/mattermost/mattermost-server (Go)9.5.0 to before 9.5.39.5.3Patch availableGHSA-5fh7-7mw7-mmx5
—github.com/mattermost/mattermost-server (Go)8.1.0 to before 8.1.128.1.12Patch availableGHSA-5fh7-7mw7-mmx5
  • Mattermost VendorMattermost Affected 9.6.0; 9.5.0 – 9.5.2; 8.1.0 – 8.1.11 Fixed in 9.7.0, 9.6.1, 9.5.3, 8.1.12 Patch available CNA
  • github.com/mattermost/mattermost-server (Go) Vendor— Affected 9.5.0 to before 9.5.3 Fixed in 9.5.3 Patch available GHSA-5fh7-7mw7-mmx5
  • github.com/mattermost/mattermost-server (Go) Vendor— Affected 8.1.0 to before 8.1.12 Fixed in 8.1.12 Patch available GHSA-5fh7-7mw7-mmx5

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*8.1.0 to before 8.1.12; 9.5.0 to before 9.5.3VulnerableMattermost
  • cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* Versions 8.1.0 to before 8.1.12; 9.5.0 to before 9.5.3 Vulnerable ·Mattermost

Remediation

  • Fix · CNA Mattermost (Mattermost) Fixed in 9.7.0, 9.6.1, 9.5.3, 8.1.12
  • Fix · GHSA-5fh7-7mw7-mmx5 github.com/mattermost/mattermost-server (Go) Fixed in 9.5.3 Advisory →
  • Fix · GHSA-5fh7-7mw7-mmx5 github.com/mattermost/mattermost-server (Go) Fixed in 8.1.12 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Advanced Cluster Management for Kubernetes 2AffectedNo fix yet: Fix deferred
Red Hat Advanced Cluster Security 3AffectedNo fix yet: Fix deferred
Not affected: 1 product
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-4195
  2. 2026-10-03 Alias added: GHSA-5fh7-7mw7-mmx5

References

Advisory 2

Other 3

  • 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