GitHub Advisoryadvisory · Go

GHSA-ff85-qw3h-g9vp Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL

MEDIUM Published 2025-11-14 Modified 2025-11-17 Official page ↗
Aliases
CVE-2025-55073
Ecosystem
Go
Packages
github.com/mattermost/mattermost-server, github.com/mattermost/mattermost/server/v8
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Weaknesses
CWE-306
Reviewed
2025-11-17

Affected packages

• Go github.com/mattermost/mattermost-server: >= 10.11.0, < 10.11.4 → fixed in 10.11.4 • Go github.com/mattermost/mattermost-server: >= 10.5.0, < 10.5.12 → fixed in 10.5.12 • Go github.com/mattermost/mattermost-server: >= 10.12.0, < 10.12.1 → fixed in 10.12.1 • Go github.com/mattermost/mattermost/server/v8: < 8.0.0-20250929212932-a41db04d2746 → fixed in 8.0.0-20250929212932-a41db04d2746

Description

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL.

Related

Alias · CVE (1)

  • CVE-2025-55073 Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to validate the relationship between the post being… vulnerability

Weakness · CWE (1)

  • CWE-306 Missing Authentication for Critical Functionality weakness

References