Authorization Bypass Through User-Controlled Key

Overview Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the shared channel inbound sync handler. An attacker can modify or delete posts belonging to other users by sending crafted synchronization messages that reference arbitrary post IDs i...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via a mismatch between the channel referenced in an action cookie and the channel of the target post. An attacker can perform unauthorized interactive post actions in private channels by using a cookie obtained...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization due to insufficient restriction of the groupconstrained channel flag in the channel patch API. An attacker can remove all participants from a group or direct message conversation by enabling the groupconstrained fl...

Protection Mechanism Failure

Overview Affected versions of this package are vulnerable to Protection Mechanism Failure via the rendering of AI bot tool result posts containing injected markdown image syntax. An attacker can exfiltrate data to an attacker-controlled server by crafting malicious content that is rendered by a...

Protection Mechanism Failure

Overview Affected versions of this package are vulnerable to Protection Mechanism Failure via the rendering of AI bot tool result posts containing injected markdown image syntax. An attacker can exfiltrate data to an attacker-controlled server by crafting malicious content that is rendered by a...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the PUT /api/v4/users/id/active endpoint. An attacker can deactivate bot accounts by leveraging user management write access without requiring Integrations access. 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...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the Host header when constructing response URLs for custom slash commands. An attacker can redirect responses to a server under their control by sending a specially crafted request with a spoofed Hos...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization in the invite confirmation process due to insufficient validation of the RefreshedToken. An attacker can bypass intended token rotation and reuse an original invite token by sending a crafted invite confirmation...

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...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization via the allowopeninvite field. An attacker can gain unauthorized access to restricted team invitation functionality by sending crafted API requests. Remediation Upgrade...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the validate input size of hashtags in HTTP requests. An attacker can exhaust CPU resources by submitting a single HTTP request containing a post with thousands of space-separated...

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...

Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the MSTeams plugin OAuth flow. An attacker can modify arbitrary posts by sending a crafted OAuth redirect URL. Remediation Upgrade github.com/mattermost/mattermost/server/public/model to...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization due to improper enforcement of the Allow users to view archived channels setting in the threads interface. An attacker can gain unauthorized access to archived channel content and files by using the "Open in...

Timing Attack

Overview Affected versions of this package are vulnerable to Timing Attack via the IsValidWebAuthRedirectURL function. An attacker can obtain sensitive information such as Cloud API keys and OAuth client secrets by analyzing response times during authentication attempts. Remediation Upgrade...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization via the Slack import functionality. An attacker can create verified user accounts with arbitrary email domains by submitting malicious import data to bypass email-based team access restrictions. Remediation Upgrade...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization via the Slack import functionality. An attacker can create verified user accounts with arbitrary email domains by submitting malicious import data to bypass email-based team access restrictions. Remediation Upgrade...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization via the Slack import functionality. An attacker can create verified user accounts with arbitrary email domains by submitting malicious import data to bypass email-based team access restrictions. Remediation Upgrade...