CVE-2025-54499

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 v3 3.1 LOW

3.1^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.6 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://mattermost.com/security-updates	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::

History

19 Oct 2026, 16:10

Type	Values Removed	Values Added
Summary		(es) Las versiones de Mattermost 10.5.x menor o igual que 10.5.10, 10.11.x menor o igual que 10.11.2 no utilizan la comparación de tiempo constante para comparaciones de cadenas sensibles, lo que permite a los atacantes explotar oráculos de temporización para realizar ataques de fuerza bruta byte a byte mediante el análisis del tiempo de respuesta en claves de API de la nube y secretos de cliente OAuth.

Information

Published : 2025-10-16 09:15

Updated : 2026-10-19 16:10

NVD link : CVE-2025-54499

Mitre link : CVE-2025-54499

CVE.ORG link : CVE-2025-54499

JSON object : View

Products Affected

mattermost

mattermost_server

CWE

CWE-208

Observable Timing Discrepancy

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