CVE-2025-12559: Exposure of Sensitive Information to an Unauthorized Actor

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-2025-11794: Exposure of Sensitive Information to an Unauthorized Actor

Mattermost versions 10.11.x = 10.11.3, 10.5.x = 10.5.11, 10.12.x = 10.12.0 fail to sanitize user data which allows system administrators to access password hashes and MFA secrets via the POST /api/v4/users/userid/email/verify/member endpoint...

CVE-2025-41443: Missing Authorization

Mattermost versions 10.5.x = 10.5.12, 10.11.x = 10.11.2 fail to properly validate guest user permissions when accessing channel information which allows guest users to discover active public channels and their metadata via the /api/v4/teams/teamid/channels/ids endpoint...

MAL-2025-41472 Malicious code in @twork-data-services/communication-api-v4-communication-voice (npm)

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CVE-2025-47870: Missing Authentication for Critical Function

Mattermost versions 10.8.x = 10.8.3, 10.5.x = 10.5.8, 9.11.x = 9.11.17, 10.9.x = 10.9.2 fail to sanitize the team invite ID in the POST /api/v4/teams/:teamId/restore endpoint which allows an team admin with no member invite privileges to get the team’s invite id...

CVE-2025-53971: Incorrect Authorization

Mattermost versions 10.5.x = 10.5.8, 9.11.x = 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles API endpoint...

MAL-2025-17208 Malicious code in clusterpoint-api-v4 (npm)

The package clusterpoint-api-v4 was found to contain malicious code...

CVE-2025-27845: Exposure of Sensitive Information to an Unauthorized Actor

In ESPEC North America Web Controller 3 before 3.3.4, /api/v4/auth/ with any invalid authentication request results in exposing a JWT secret. This allows for elevated permissions to the UI...

CVE-2025-4573: Improper Neutralization of Special Elements used in an LDAP Query

Mattermost versions 10.7.x = 10.7.1, 10.6.x = 10.6.3, 10.5.x = 10.5.4, 9.11.x = 9.11.13 fail to properly validate LDAP group ID attributes, allowing an authenticated administrator with PermissionSysconsoleWriteUserManagementGroups permission to execute LDAP search filter injection via the PUT...

CVE-2025-4128: Incorrect Authorization

Mattermost versions 10.5.x = 10.5.4, 9.11.x = 9.11.13 fail to properly restrict API access to team information, allowing guest users to bypass permissions and view information about public teams they are not members of via a direct API call to /api/v4/teams/teamid...

CVE-2025-27538: Missing Authentication for Critical Function

Mattermost versions 10.5.x = 10.5.1, 9.11.x = 9.11.9 fail to enforce MFA checks in PUT /api/v4/users/user-id/mfa when the requesting user differs from the target user ID, which allows users with editotherusers permission to activate or deactivate MFA for other users, even if those users have not...

CVE-2025-24866: Incorrect Authorization

Mattermost versions 9.11.x = 9.11.8 fail to enforce proper access controls on the /api/v4/audits endpoint, allowing users with delegated granular administration roles who lack access to Compliance Monitoring to retrieve User Activity Logs...

CVE-2024-42000: Incorrect Authorization

Mattermost versions 9.10.x = 9.10.2, 9.11.x = 9.11.1, 9.5.x = 9.5.9 and 10.0.x = 10.0.0 fail to properly authorize the requests to /api/v4/channels which allows a User or System Manager, with "Read Groups" permission but with no access for channels to retrieve details about private channels that...

CVE-2024-42411 User creation date manipulation in POST /api/v4/users

Mattermost versions 9.9.x = 9.9.1, 9.5.x = 9.5.7, 9.10.x = 9.10.0, 9.8.x = 9.8.2 fail to restrict the input in POST /api/v4/users which allows a user to manipulate the creation date in POST /api/v4/users tricking the admin into believing their account is much older...

CVE-2024-42411: Improper Check for Unusual or Exceptional Conditions

Mattermost versions 9.9.x = 9.9.1, 9.5.x = 9.5.7, 9.10.x = 9.10.0, 9.8.x = 9.8.2 fail to restrict the input in POST /api/v4/users which allows a user to manipulate the creation date in POST /api/v4/users tricking the admin into believing their account is much older...

CVE-2024-29221: Improper Access Control

Improper Access Control in Mattermost Server versions 9.5.x before 9.5.2, 9.4.x before 9.4.4, 9.3.x before 9.3.3, 8.1.x before 8.1.11 lacked proper access control in the /api/v4/users/me/teams endpoint allowing a team admin to get the invite ID of their team, thus allowing them to invite users,...

CVE-2024-24776: Improper Access Control

Mattermost fails to check the required permissions in the POST /api/v4/channels/stats/membercount API resulting in channel member counts being leaked to a user without permissions...

CVE-2023-47858: Improper Access Control

Mattermost fails to properly verify the permissions needed for viewing archived public channels, allowing a member of one team to get details about the archived public channels of another team via the GET /api/v4/teams/ /channels/deleted endpoint...

CVE-2023-5969: Uncontrolled Resource Consumption

Mattermost fails to properly sanitize the request to /api/v4/redirectlocation allowing an attacker, sending a specially crafted request to /api/v4/redirectlocation, to fill up the memory due to caching large items...

CVE-2023-5333 Denial of Service via multiple identical User IDs in /api/v4/users/ids

Mattermost fails to deduplicate input IDs allowing a simple user to cause the application to consume excessive resources and possibly crash by sending a specially crafted request to /api/v4/users/ids with multiple identical IDs...