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Advisory record · GHSA-xr3w-rmvj-f6m7

Mattermost has an Observable Timing Discrepancy vulnerability in github.com/mattermost/mattermost-server

CVSS 3.1 LowEPSS 0.0028 · 20th percentile

Published by the GitHub Advisory Database at 30 Oct 2025, 15:02 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/mattermost/mattermost-serverGo>=10.5.0+incompatible, <10.5.11+incompatible || >=10.11.0+incompatible, <10.11.3+incompatible10.5.11+incompatible, 10.11.3+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<8.0.0-20250728063359-38208b8f065f8.0.0-20250728063359-38208b8f065f
Identifiers
GHSA-xr3w-rmvj-f6m7 · CVE-2025-54499 · GO-2025-4036
Weakness (CWE)
CWE-208
Tags
Published
30 Oct 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
3.1 Low 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N CNA (Mattermost)
  • CISA KEV Not listed.
  • EPSS 0.0028, the 20th percentile, on 6 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 30 Oct 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.