CVE-2025-54499
Insecure string comparison enables timing attacks
Vexday Risk Score
8Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 3.1EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
16 Oct 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Affected products
Mattermost · MattermostWant to know if your infrastructure is exposed to this?
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https://mattermost.com/security-updates