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 properly validate cache keys for link metadata which allows authenticated users to access unauthorized posts and poison link previews via hash collision attacks on FNV-1 hashing
References
History

Wed, 17 Sep 2025 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost mattermost
Vendors & Products Mattermost mattermost

Tue, 16 Sep 2025 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost
Mattermost mattermost Server

Mon, 15 Sep 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 15 Sep 2025 10:15:00 +0000

Type Values Removed Values Added
Description 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 properly validate cache keys for link metadata which allows authenticated users to access unauthorized posts and poison link previews via hash collision attacks on FNV-1 hashing
Title Weak cache keys lead to post IDOR and link preview poisoning
Weaknesses CWE-328
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2025-09-15T10:10:06.886Z

Updated: 2025-09-15T13:57:49.086Z

Reserved: 2025-08-15T15:34:54.442Z

Link: CVE-2025-9078

cve-icon Vulnrichment

Updated: 2025-09-15T13:53:39.946Z

cve-icon NVD

Status : Analyzed

Published: 2025-09-15T10:15:32.627

Modified: 2025-09-16T15:58:12.830

Link: CVE-2025-9078

cve-icon Redhat

No data.