EUVD-2026-31221

Mattermost versions 11.5.x = 11.5.1 fail to validate team-level runcreate permission against the target team when creating a playbook run which allows an authenticated team member to create runs in teams where they lack permission via specifying a different team ID in the run creation API request...

PT-2026-42439

Name of the Vulnerable Software and Affected Versions Mattermost version 11.6.0 Mattermost version 11.5.3 Mattermost version 11.4.4 Mattermost version 10.11.14 Description A path traversal issue exists where the application fails to properly validate the integration action URL. This allows an...

Mattermost 安全漏洞

Mattermost is an open-source collaboration platform developed by the American company Mattermost. Versions of Mattermost such as 11.5.1 and earlier 11.5.x have security vulnerabilities. These vulnerabilities stem from a failure to verify the team-level operating permissions for target teams,...

Mattermost 路径遍历漏洞

Mattermost is an open-source collaboration platform developed by the American company Mattermost. Versions of Mattermost such as 11.6.0 and earlier 11.6.x series, 11.5.3 and earlier 11.5.x series, 11.4.4 and earlier 11.4.x series, as well as 10.11.14 and earlier 10.11.x series, have a path...

Mattermost Mobile Apps 跨站请求伪造漏洞

Mattermost Mobile Apps is a messaging mobile application developed by the American company Mattermost. Versions of Mattermost Mobile Apps prior to 2.0.37, 11.0.4 and earlier, 11.1.3 and earlier, 11.3.2 and earlier, as well as 10.11.11.0 and earlier, contain a cross-site request forgeing...

PT-2026-42674

Name of the Vulnerable Software and Affected Versions NocoDB versions prior to 2026.04.1 Description The request-filtering-agent Server-Side Request Forgery SSRF protection is non-functional in the Slack, Discord, Mattermost, and Teams notification webhook plugins. This occurs because the httpAge...

PT-2026-42404

Name of the Vulnerable Software and Affected Versions Mattermost versions 11.5.x through 11.5.1 Description An incorrect authorization issue exists during the creation of a playbook run. The system fails to validate the team-level run create permission against the target team. This allows an...

PT-2026-42432

Name of the Vulnerable Software and Affected Versions Mattermost Mobile Apps versions prior to 2.38 Description The application fails to properly validate the SSO authentication callback origin. This allows an attacker who controls a malicious Mattermost server to steal user credentials for a...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the command update API. An attacker can impersonate existing system or custom commands by editing their own slash command trigger to match an already-registered trigger, potentially hijacking command...

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 command update API. An attacker can impersonate existing system or custom commands by editing their own slash...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the command update API. An attacker can impersonate existing system or custom commands by editing their own slash command trigger to match an already-registered trigger, potentially hijacking command...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization via the post rewrite endpoint. An attacker can gain unauthorized access to the content of threads in private channels and direct messages by sending a crafted request. Remediation Upgrade...

Insertion of Sensitive Information into Log File

Overview Affected versions of this package are vulnerable to Insertion of Sensitive Information into Log File via the support packet generation process. An attacker can access sensitive credentials in plaintext by downloading a support packet from the System Console. This is only exploitable if t...

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...

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...

Insertion of Sensitive Information into Log File

Overview github.com/mattermost/mattermost-plugin-calls/server is a package that enables voice calling and screen sharing functionality in Mattermost channels Affected versions of this package are vulnerable to Insertion of Sensitive Information into Log File via the plugin configuration process. ...

Origin Validation Error

Overview Affected versions of this package are vulnerable to Origin Validation Error via the burn-on-read reveal endpoint due to missing validation of the X-Requested-With header. An attacker can force the unauthorized reveal of a burn-on-read message without recipient consent by sending a crafte...

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 membership sync process. An attacker can remove users from any channel, including private channels, by sending...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the group subscription process. An attacker can gain unauthorized access to groups that were not intended to be accessible by creating groups with prefixes matching those of whitelisted groups. Remediation A...