CVE-2025-9078

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

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://mattermost.com/security-updates	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::

History

19 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) Las versiones de Mattermost 10.8.x menor o igual que 10.8.3, 10.5.x menor o igual que 10.5.8, 9.11.x menor o igual que 9.11.17, 10.10.x menor o igual que 10.10.1, 10.9.x menor o igual que 10.9.3 no validan correctamente las claves de caché para los metadatos de enlaces, lo que permite a los usuarios autenticados acceder a publicaciones no autorizadas y envenenar las previsualizaciones de enlaces mediante ataques de colisión de hash en el hashing FNV-1.

Information

Published : 2025-09-15 10:15

Updated : 2026-10-19 17:10

NVD link : CVE-2025-9078

Mitre link : CVE-2025-9078

CVE.ORG link : CVE-2025-9078

JSON object : View

Products Affected

mattermost

mattermost_server

CWE

CWE-328

Use of Weak Hash

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