CVE-2025-54499 - CVE House
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Status published Low CVE-2025-54499

Insecure string comparison enables timing attacks

Vulnerability 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

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • DoyenSec

References

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Affected Vendor

Affected Software

Mattermost
Vulnerable Versions:
10.5.0, 10.11.0, 10.12.0, 10.5.11, 10.11.3

Timeline

Official Publish: October 16th, 2025
Last Modified: October 16th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Weaknesses (CWE)

CWE-208

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.