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TI-2024-28017 Aliases CVE-2024-42000GHSA-hpq2-jq6g-6g73

Unauthorized Access to view channels' details

Priority LOW 20CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-863.

Summary

Mattermost versions 9.10.x <= 9.10.2, 9.11.x <= 9.11.1, 9.5.x <= 9.5.9 and 10.0.x <= 10.0.0 fail to properly authorize the requests to /api/v4/channels  which allows a User or System Manager, with "Read Groups" permission but with no access for channels to retrieve details about private channels that they were not a member of by sending a request to /api/v4/channels.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00287 21st percentileScored 2026-11-07
Fix Fixed Mattermost (Mattermost): 10.1.0, 9.10.3, 9.11.2 +2

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
MattermostMattermost9.10.0 – 9.10.2; 9.11.0 – 9.11.1; 9.5.0 – 9.5.9; 10.0.010.1.0, 9.10.3, 9.11.2, 9.5.10, 10.0.1Patch availableCNA
  • Mattermost VendorMattermost Affected 9.10.0 – 9.10.2; 9.11.0 – 9.11.1; 9.5.0 – 9.5.9; 10.0.0 Fixed in 10.1.0, 9.10.3, 9.11.2, 9.5.10, 10.0.1 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*9.5.0 to before 9.5.10; 9.10.0 to before 9.10.3; 9.11.0 to before 9.11.2VulnerableMattermost
cpe:2.3:a:mattermost:mattermost_server:10.0.0:-:*:*:*:*:*:*10.0.0VulnerableMattermost
cpe:2.3:a:mattermost:mattermost_server:10.0.0:rc1:*:*:*:*:*:*10.0.0 rc1VulnerableMattermost
cpe:2.3:a:mattermost:mattermost_server:10.0.0:rc2:*:*:*:*:*:*10.0.0 rc2VulnerableMattermost
cpe:2.3:a:mattermost:mattermost_server:10.0.0:rc3:*:*:*:*:*:*10.0.0 rc3VulnerableMattermost
cpe:2.3:a:mattermost:mattermost_server:10.0.0:rc4:*:*:*:*:*:*10.0.0 rc4VulnerableMattermost
  • cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* Versions 9.5.0 to before 9.5.10; 9.10.0 to before 9.10.3; 9.11.0 to before 9.11.2 Vulnerable ·Mattermost
  • cpe:2.3:a:mattermost:mattermost_server:10.0.0:-:*:*:*:*:*:* Versions 10.0.0 Vulnerable ·Mattermost
  • cpe:2.3:a:mattermost:mattermost_server:10.0.0:rc1:*:*:*:*:*:* Versions 10.0.0 rc1 Vulnerable ·Mattermost
  • cpe:2.3:a:mattermost:mattermost_server:10.0.0:rc2:*:*:*:*:*:* Versions 10.0.0 rc2 Vulnerable ·Mattermost
  • cpe:2.3:a:mattermost:mattermost_server:10.0.0:rc3:*:*:*:*:*:* Versions 10.0.0 rc3 Vulnerable ·Mattermost
  • cpe:2.3:a:mattermost:mattermost_server:10.0.0:rc4:*:*:*:*:*:* Versions 10.0.0 rc4 Vulnerable ·Mattermost

Remediation

  • Fix · CNA Mattermost (Mattermost) Fixed in 10.1.0, 9.10.3, 9.11.2, 9.5.10, 10.0.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-42000
  2. 2026-10-03 Alias added: GHSA-hpq2-jq6g-6g73

References

Advisory 1

  • 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