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Advisory record · GHSA-qh58-9v3j-wcjc

Mattermost allows authenticated users to write files to arbitrary locations in github.com/mattermost/mattermost-server

CVSS 9.9 CriticalCriticalEPSS 0.010 · 63rd percentile

Critical, because:

  • CVSS score 9.9: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 28 Jul 2025, 19:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/mattermost/mattermost-serverGo<0.0.0-20250519205859-65aec10162f6 || >=9.11.0+incompatible, <9.11.16+incompatible || >=10.5.0+incompatible, <10.5.6+incompatible || >=10.6.0+incompatible, <10.6.6+incompatible || >=10.7.0+incompatible, <10.7.3+incompatible || >=10.8.0+incompatible, <10.8.1+incompatible0.0.0-20250519205859-65aec10162f6, 9.11.16+incompatible, 10.5.6+incompatible, 10.6.6+incompatible, 10.7.3+incompatible, 10.8.1+incompatible
github.com/mattermost/mattermost-server/v5Goall versionsNo fixed version yet
github.com/mattermost/mattermost-server/v6Goall versionsNo fixed version yet
github.com/mattermost/mattermost/server/v8Go<8.0.0-20250519205859-65aec10162f68.0.0-20250519205859-65aec10162f6
Identifiers
GHSA-qh58-9v3j-wcjc · CVE-2025-4981 · GO-2025-3769
Weakness (CWE)
CWE-427
Tags
Published
28 Jul 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

ScoreRatingCVSSVectorSource
9.9 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CNA (Mattermost)
  • CISA KEV Not listed.
  • EPSS 0.010, the 63rd percentile, on 8 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 28 Jul 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.