CVE-2025-27936 MEDIUM

CVE-2025-27936: Webhook Secret Exposure via Timing attack in MSteams plugin

Vendor Mattermost
Product Mattermost
Weakness CWE-208
Published April 16, 2025
Last update April 16, 2025
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.

Key dates

02Disclosure timeline

April 16, 2025 CVE published
April 16, 2025 Record updated