CVE-2025-9078

MediumCVSS 4.3/10Last modified Oct 19, 2026

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

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-328

Affected software

No affected versions have been published.

Timeline

Published: Sep 15, 2025
Last modified: Oct 19, 2026
NVD status: Analyzed

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