TI-2024-01809 Aliases CVE-2024-1942 GHSA-hwjf-4667-gqwx

Improper access control in Mattermost

LOW 20CWE-284Published 2024-02-29 · Updated 2024-08-12

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 · CNA. Fix status from CNA and GitHub. Impact type from CWE-284.

Summary

Mattermost versions 8.1.x before 8.1.9, 9.2.x before 9.2.5, and 9.3.0 fail to sanitize the metadata on posts containing permalinks under specific conditions, which allows an authenticated attacker to access the contents of individual posts in channels they are not a member of.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0036 29th percentileScored 2026-11-07

Fix Fixed Mattermost (Mattermost): 9.4, 9.3.1, 9.2.5 +1github.com/mattermost/mattermost/server/v8 (Go): 9.3.1, 9.2.5, 8.1.9

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

Vendor	Product	Affected versions	Fixed in	Status	Source
Mattermost	Mattermost	9.2.0 – 9.2.4; 8.1.0 – 8.1.8; 9.3.0	9.4, 9.3.1, 9.2.5, 8.1.9	Patch available	CNA
—	github.com/mattermost/mattermost/server/v8 (Go)	9.3.0 to before 9.3.1	9.3.1	Patch available	GHSA-hwjf-4667-gqwx
—	github.com/mattermost/mattermost/server/v8 (Go)	9.2.0 to before 9.2.5	9.2.5	Patch available	GHSA-hwjf-4667-gqwx
—	github.com/mattermost/mattermost/server/v8 (Go)	before 8.1.9	8.1.9	Patch available	GHSA-hwjf-4667-gqwx

Mattermost VendorMattermost Affected 9.2.0 – 9.2.4; 8.1.0 – 8.1.8; 9.3.0 Fixed in 9.4, 9.3.1, 9.2.5, 8.1.9 Patch available CNA
github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected 9.3.0 to before 9.3.1 Fixed in 9.3.1 Patch available GHSA-hwjf-4667-gqwx
github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected 9.2.0 to before 9.2.5 Fixed in 9.2.5 Patch available GHSA-hwjf-4667-gqwx
github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected before 8.1.9 Fixed in 8.1.9 Patch available GHSA-hwjf-4667-gqwx

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:mattermost:mattermost_server::::::::	8.1.0 to before 8.1.9; 9.2.0 to before 9.2.5	Vulnerable	Mattermost
cpe:2.3:a:mattermost:mattermost_server:9.3.0:::::::*	9.3.0	Vulnerable	Mattermost

cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* Versions 8.1.0 to before 8.1.9; 9.2.0 to before 9.2.5 Vulnerable ·Mattermost
cpe:2.3:a:mattermost:mattermost_server:9.3.0:*:*:*:*:*:*:* Versions 9.3.0 Vulnerable ·Mattermost

Remediation

Fix · CNA Mattermost (Mattermost) Fixed in 9.4, 9.3.1, 9.2.5, 8.1.9
Fix · GHSA-hwjf-4667-gqwx github.com/mattermost/mattermost/server/v8 (Go) Fixed in 9.3.1 Advisory →
Fix · GHSA-hwjf-4667-gqwx github.com/mattermost/mattermost/server/v8 (Go) Fixed in 9.2.5 Advisory →
Fix · GHSA-hwjf-4667-gqwx github.com/mattermost/mattermost/server/v8 (Go) Fixed in 8.1.9 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2024-1942
2026-10-03 Alias added: GHSA-hwjf-4667-gqwx

References

Advisory 2

Other 1

https://github.com/mattermost/mattermost

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