Vulnerabilities fixed in Mattermost

Mattermost has fixed vulnerabilities in versions 11.0.x through 11.0.3, 10.12.x through 10.12.1, 10.11.x through 10.11.4 and 10.5.x through 10.5.12. The vulnerabilities allow an authenticated attacker to take over an account via a carefully crafted email address during the authentication process...

EUVD-2025-199827

Mattermost versions 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12, 11.0.x = 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of...

EUVD-2025-199831

Mattermost versions 11.0.x = 11.0.2, 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/channelid/commonteams endpoint...

Mattermost fails to sanitize team email addresses

Mattermost versions 11.0.x = 11.0.2, 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/channelid/commonteams endpoint...

Mattermost fails to properly validate OAuth state tokens during OpenID Connect authentication

Mattermost versions 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12, 11.0.x = 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of...

GHSA-3X39-62H4-F8J6 Mattermost fails to properly validate OAuth state tokens during OpenID Connect authentication

Mattermost versions 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12, 11.0.x = 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of...

Information Exposure

Overview Affected versions of this package are vulnerable to Information Exposure via the GET /api/v4/channels/channelid/commonteams endpoint. An attacker can access team email addresses intended to be visible only to Team Admins by making authenticated requests to this endpoint. Remediation...

CVE-2025-12559

Mattermost versions 11.0.x = 11.0.2, 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/channelid/commonteams endpoint...

CVE-2025-12559

Mattermost suffers an information-disclosure vulnerability CVE-2025-12559 where certain versions are not sanitizing team email addresses. Affected: Mattermost Server 11.0.x <= 11.0.2; 10.12.x <= 10.12.1; 10.11.x <= 10.11.4; 10.5.x

CVE-2025-12559 Information Disclosure in Common Teams API

Mattermost versions 11.0.x = 11.0.2, 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/channelid/commonteams endpoint...

CVE-2025-12559 Information Disclosure in Common Teams API

Mattermost versions 11.0.x = 11.0.2, 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/channelid/commonteams endpoint...

CVE-2025-12559 Information Disclosure in Common Teams API

Mattermost versions 11.0.x = 11.0.2, 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/channelid/commonteams endpoint...

CVE-2025-12419

Mattermost versions 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12, 11.0.x = 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of...

CVE-2025-12419 Account takeover on OAuth/OpenID-enabled servers

Mattermost versions 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12, 11.0.x = 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of...

A Bootiful Podcast: Spring community legend and friend Simon Martinelli

Hi, Spring fans! Happy Thanksgiving from me, and I am sure the entire Spring team, to you! We are, it should be clear, oh so very grateful.. thankful.. for you, the community. This week it is my great pleasure to chat with Spring community legend Simon Martinelli...

PT-2025-48275

Mattermost versions 11.0.x = 11.0.2, 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/channel id/common teams endpoint...

CVE-2025-38678

creationtimestamp| type| source ---|---|--- 2025-11-24 15:00:07+00:00| published-proof-of-concept| Telegram/5Go4y9Sp59a8HRsoMaTj0X-e6nFTkvRgJdqk6vUB2AgWKv0 2025-11-27 07:58:22+00:00| published-proof-of-concept| https://t.me/GithubRedTeam/60913...

CVE-2025-66083

Missing Authorization vulnerability in magepeopleteam WpEvently mage-eventpress allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WpEvently: from n/a through = 5.0.4...

CVE-2025-62730

SOPlanning is vulnerable to Privilege Escalation in user management tab. Users with usermanageteam role are allowed to modify permissions of users. However, they are able to assign administrative permissions to any user including themselves. This allow a malicious authenticated attacker with this...

Terraform Enterprise state versions can be created by users without sufficient write access

Summary Terraform state versions can be created by a user with specific but insufficient permissions in a Terraform Enterprise workspace. This may allow for the alteration of infrastructure if a subsequent plan operation is approved by a user with approval permission or is auto-applied. This...