GitHub Advisoryadvisory · Go

GHSA-2j87-p623-8cc2 Mattermost vulnerable to Observable Timing Discrepancy

MEDIUM Published 2025-04-16 Modified 2025-04-23 Official page ↗
Aliases
CVE-2025-27936
Ecosystem
Go
Packages
github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-plugin-msteams
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-208
Reviewed
2025-04-16

Affected packages

• Go github.com/mattermost/mattermost/server/v8: >= 10.5.0, < 10.5.2 → fixed in 10.5.2 • Go github.com/mattermost/mattermost/server/v8: < 8.0.0-20250314142426-c049748b8863 → fixed in 8.0.0-20250314142426-c049748b8863 • Go github.com/mattermost/mattermost-plugin-msteams: < 2.1.0 → fixed in 2.1.0

Description

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.

Related

Alias · CVE (1)

  • CVE-2025-27936 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… vulnerability

Weakness · CWE (1)

  • CWE-208 Observable Timing Discrepancy weakness

References