CVE-2025-54499 — Observable Timing Discrepancy in Mattermost Mattermost-server

CWE-208 — Observable Timing Discrepancy5 documents4 sources
Severity
3.7LOWNVD
CNA3.1
EPSS
0.0%
top 90.98%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Github.com Mattermost Mattermost-serverGithub.com Mattermost Mattermost Server V8Mattermost Server+1 more
Timeline
PublishedOct 16
Latest updateOct 30

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

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:NExploitability: 2.2 | Impact: 1.4

Affected Packages4 packages

▶NVDmattermost/mattermost_server10.5.0 — 10.5.11+1
▶Gogithub.com/mattermost_mattermost_server_v8< 8.0.0-20250728063359-38208b8f065f
▶CVEListV5mattermost/mattermost10.5.0 — 10.5.10+1

🔴Vulnerability Details

4
OSV
Mattermost has an Observable Timing Discrepancy vulnerability in github.com/mattermost/mattermost-server↗2025-10-30
▶
OSV
Mattermost has an Observable Timing Discrepancy vulnerability↗2025-10-16
▶
CVEList
Insecure string comparison enables timing attacks↗2025-10-16
▶
GHSA
Mattermost has an Observable Timing Discrepancy vulnerability↗2025-10-16
▶
CVE-2025-54499 — Observable Timing Discrepancy | cvebase