Advisory record · GHSA-9p92-x77w-9fw2

Mattermost makes Use of Weak Hash in github.com/mattermost/mattermost-server

CVSS 4.3 MediumEPSS 0.0015 · 4th percentile

Published by the GitHub Advisory Database at 17 Sept 2025, 17:03 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
github.com/mattermost/mattermost-server	Go	>=9.11.0+incompatible, <9.11.18+incompatible \|\| >=10.5.0+incompatible, <10.5.9+incompatible \|\| >=10.8.0+incompatible, <10.8.4+incompatible \|\| >=10.9.0+incompatible, <10.9.4+incompatible \|\| >=10.10.0+incompatible, <10.10.2+incompatible	9.11.18+incompatible, 10.5.9+incompatible, 10.8.4+incompatible, 10.9.4+incompatible, 10.10.2+incompatible
github.com/mattermost/mattermost-server/v5	Go	all versions	No fixed version yet
github.com/mattermost/mattermost-server/v6	Go	all versions	No fixed version yet
github.com/mattermost/mattermost/server/v8	Go	<8.0.0-20250718075842-cd87e5c87737	8.0.0-20250718075842-cd87e5c87737

Identifiers: GHSA-9p92-x77w-9fw2 · CVE-2025-9078 · GO-2025-3959
Weakness (CWE): CWE-328
Tags: Weak cryptography or TLS
Published: 17 Sept 2025
Updated: 3 Mar 2026

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
4.3	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	CNA (Mattermost)

CISA KEV Not listed.
EPSS 0.0015, the 4th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 17 Sept 2025. New records show when each source confirmed them.

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.