Low severityNVD Advisory· Published Oct 16, 2025· Updated Oct 16, 2025
Insecure string comparison enables timing attacks
CVE-2025-54499
Description
Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to use constant-time comparison for sensitive string comparisons which allows attackers to exploit timing oracles to perform byte-by-byte brute force attacks via response time analysis on Cloud API keys and OAuth client secrets
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost/server/v8Go | < 8.0.0-20250728063359-38208b8f065f | 8.0.0-20250728063359-38208b8f065f |
github.com/mattermost/mattermost-serverGo | >= 10.5.0, < 10.5.11 | 10.5.11 |
github.com/mattermost/mattermost-serverGo | >= 10.11.0, < 10.11.3 | 10.11.3 |
Affected products
4- ghsa-coords3 versionspkg:golang/github.com/mattermost/mattermost-serverpkg:golang/github.com/mattermost/mattermost/server/v8pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Tumbleweed
>= 10.5.0, < 10.5.11+ 2 more
- (no CPE)range: >= 10.5.0, < 10.5.11
- (no CPE)range: < 8.0.0-20250728063359-38208b8f065f
- (no CPE)range: < 0.0.20251105T184115-1.1
- Range: 10.5.0
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-xr3w-rmvj-f6m7ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-54499ghsaADVISORY
- github.com/mattermost/mattermost/commit/38208b8f065f0786eac0e968f9d754b91b62878cghsaWEB
- github.com/mattermost/mattermost/commit/97a4c7839cf5610cfe17c52042878aebb7678372ghsaWEB
- mattermost.com/security-updatesghsaWEB
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