CVE-2025-54499

LOW

Mattermost <10.5.10, <10.11.2 - Info Disclosure

Title source: llm

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

References (1)

[Vendor Advisory] https://mattermost.com/security-updates

Scores

CVSS v3 3.1

EPSS 0.0003

EPSS Percentile 9.1%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-208

Status published

Products (3)

mattermost/mattermost 0 - 8.0.0-20250728063359-38208b8f065fGo

mattermost/mattermost-server 10.5.0 - 10.5.11Go

mattermost/mattermost_server 10.5.0 - 10.5.11

Published Oct 16, 2025

Tracked Since Feb 18, 2026