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CVE-2025-9078: mattermost server from 9.11.0 (inclusive), before 9.11.18 (exclusive), from 10.5.0 (inclusive), before 10.5.9…
CVE-2025-9078. CVSS 3.1 base score 4.3 (MEDIUM, Vendor/CNA). EPSS 0.00154 (percentile 0.04151), scored 19-Oct-2026.
Affected technology
mattermost server · from 9.11.0 (inclusive), before 9.11.18 (exclusive)
mattermost
mattermost server · from 10.5.0 (inclusive), before 10.5.9 (exclusive)
mattermost
mattermost server · from 10.8.0 (inclusive), before 10.8.4 (exclusive)
mattermost
mattermost server · from 10.9.0 (inclusive), before 10.9.4 (exclusive)
mattermost
mattermost server · from 10.10.0 (inclusive), before 10.10.2 (exclusive)
mattermost
Mattermost · 10.8.0 through 10.8.3, 10.5.0 through 10.5.8, 9.11.0 through 9.11.17, 10.10.0 through 10.10.1, 10.9.0 through 10.9.3
Mattermost
Description’s affected range: versions 10.8.x <= 10.8.3
Component: Not specified by the source
Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required
What an attacker can do
Authenticated users can access unauthorized posts and poison link previews via hash collision attacks on FNV-1 hashing. Vendor/CNA’s CVSS 3.1 assessment (base score 4.3/10) rates confidentiality impact as low; integrity and availability impact as none.
- CWE
- CWE-328
- CCR priority
- 17.2 /100 (P5)
- CVSS 3.1
- 4.3 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N · Vendor/CNA
- EPSS
- 0.00154 · percentile 0.04151 · 2026-10-19
- KEV
- no
Provenance
- NVD CVE API 2.0 · Source record · observed 2026-10-19 17:57:47.606446+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2025-9078.html