Communication and Collaboration

In Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 and Mattermost Jira plugin versions <=4.4.0 a medium severity vulnerability CVE-2025-14273 was detected. This vulnerability allows unauthenticated attackers to issue forged GET and POST requests to the Jira server by spoofing user IDs and injecting arbitrary issue key paths due to improper enforcement of authentication and path restrictions in the Jira plugin. To address this issue, users should upgrade Mattermost to versions 11.2.0, 11.1.1, 11.0.6, 10.12.4, 10.11.8 or later and Mattermost Jira plugin to version 4.4.1 or higher. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-14273.

In Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3 and 10.11.x <= 10.11.7 a medium severity vulnerability CVE-2025-13767 was detected. This vulnerability allows attackers to read content and attachments from private channels without proper membership validation when using the Jira plugin. To address this issue, users should upgrade Mattermost to versions 11.2.0, 11.1.1, 11.0.6, 10.12.4, 10.11.8 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-13767.

In Mattermost versions 10.11.x up to and including 10.11.5, 11.0.x up to and including 11.0.4, and 10.12.x up to and including 10.12.2 a medium severity vulnerability CVE-2025-13324 was detected. This vulnerability allows attackers who intercept invite tokens to reuse them after initial use, enabling unauthorized manipulation of channel memberships, including adding or removing users from private channels via a token replay attack. To address this issue, users should upgrade Mattermost to versions 11.1.0, 10.11.6, 11.0.5, 10.12.3 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-13324.

In Mattermost versions 11.0.x ≤ 11.0.4, 10.12.x ≤ 10.12.2, and 10.11.x ≤ 10.11.6 a medium severity vulnerability CVE-2025-12689 was detected. This vulnerability allows attackers to crash the Mattermost Calls plugin by sending malformed WebSocket requests that are not properly validated for UTF-8 encoding, resulting in a denial-of-service condition. To address this issue, users should upgrade Mattermost to versions 11.1.0, 11.0.5, 10.12.3, 10.11.7 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-12689.

In Mattermost Desktop App versions prior to 6.0.0 a low severity vulnerability CVE-2025-13326 was detected. This vulnerability allows attackers to inherit macOS Transparency, Consent, and Control (TCC) permissions by copying the application binary to a temporary folder due to the Hardened Runtime not being enabled when the app is packaged for the Mac App Store. To address this issue, users should upgrade Mattermost Desktop App to version 6.0.0 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-13326.

In Mattermost Desktop App versions below 6.0.0 a low severity vulnerability CVE-2025-13321 was detected. This vulnerability allows attackers with access to a user’s system to gain access to potentially sensitive information by reading unsanitized application logs and data not cleared upon server deletion. To address this issue, users should upgrade Mattermost Desktop App to version 6.0.0 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-13321.

In Mattermost versions 10.11.x up to and including 10.11. a low severity vulnerability CVE-2025-62690 was detected. This vulnerability allows attackers to redirect victims to malicious websites by abusing improper validation of redirect URLs on the /error page through a crafted link opened in a new tab. To address this issue, users should upgrade Mattermost to version 11.1.0 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-62690.

In Mattermost versions 11.0.x up to and including 11.0.4, 10.12.x up to and including 10.12.2, 10.11.x up to and including 10.11.6, and Mattermost Calls versions up to and including 1.10.0 a medium severity vulnerability CVE-2025-62190 was detected. This vulnerability allows authenticated attackers to initiate calls and inject messages into channels or direct messages by exploiting missing CSRF protection on the Calls widget page via a malicious webpage or crafted link. To address this issue, users should upgrade Mattermost to versions 11.1.0, 11.0.5, 10.12.3, 10.11.7 or Mattermost Calls plugin to version 1.11.0 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-62190.

In Mattermost versions 10.11.x up to and including 10.11.6 and Mattermost GitHub plugin versions up to and including 2.4.0 a low severity vulnerability CVE-2025-13352 was detected. This vulnerability allows attackers to hijack the GitHub reaction forwarding feature by exploiting insufficient validation of the plugin bot identity, causing users to unknowingly add reactions to arbitrary GitHub objects via crafted notification posts. To address this issue, users should upgrade Mattermost to versions 11.1.0, 10.11.5 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-13352.