Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the schemeadmin flag in group syncable link and patch endpoints. An attacker can gain unauthorized administrative privileges by sending crafted API requests. Remediation Upgrade...

Insufficiently Protected Credentials

Overview Affected versions of this package are vulnerable to Insufficiently Protected Credentials via the Slack import process. An attacker can gain unauthorized access to user accounts by obtaining disclosed passwords and impersonating users. Remediation Upgrade...

Denial of Service (DoS)

Overview Affected versions of this package are vulnerable to Denial of Service DoS due to the lack of rate limiting in the login process. An attacker can exhaust server resources by sending a large number of parallel login requests via a single HTTP/2 packet, potentially causing the server to cra...

Incorrect Authorization

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Authorization in the authentication process. An attacker can change another user's account password without confirmation by falsely...

Memory Allocation with Excessive Size Value

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value in the integration action endpoints. An attacker can exhaust server memory and disrupt service...

Incorrect Implementation of Authentication Algorithm

Overview Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm. An attacker can gain unauthorized access to another user's account by leveraging a specially crafted email address when switching authentication methods and sending a request to the...

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...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the /api/v4/teams/teamid/channels/searcharchived endpoint. An attacker can access information about archived public channels by sending crafted requests as a guest user. Remediation Upgrade...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the /api/v4/teams/teamid/channels/searcharchived endpoint. An attacker can access information about archived public channels by sending crafted requests as a guest user. Remediation Upgrade...

Open Redirect

Overview Affected versions of this package are vulnerable to Open Redirect via improper validation of redirect URLs in the OAuth login process. An attacker can redirect users to malicious sites by crafting specific OAuth login URLs. Remediation Upgrade...

Incorrect Authorization

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Authorization via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles endpoint. An attacker can modify team member roles without...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the ExperimentalSettings function. An attacker can exploit this issue by accessing unauthorized settings through the System Console. Note: This is only exploitable if the RestrictSystemAdmin setting is true,...

Incorrect Authorization

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Authorization due to the improper verification of user permissions when accessing groups. An attacker can view unauthorized group...

Exposure of Sensitive Information Through Metadata

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Exposure of Sensitive Information Through Metadata when executing the UpdateChannelBookmark function, due to improper handling of user permissions...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization in that a user with the "Edit Other Users" permission set, but not broader high-level permissions, can modify the properties of admin accounts. Remediation Upgrade...