Communication and Collaboration

In Mattermost versions prior to 11 a medium severity vulnerability CVE-2025-55070 was identified. This vulnerability allows unauthenticated users to bypass multi-factor authentication enforcement on WebSocket connections, potentially leading to unauthorized access to sensitive information via WebSocket events. To fix this vulnerability, users should upgrade Mattermost to version 11.0 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-55070.

In Mattermost versions prior to 11.0 a low severity vulnerability CVE-2025-41436 was identified. This vulnerability allows regular users to bypass the “Allow users to view archived channels” setting and access archived channel content and files via the “Open in Channel” functionality from followed threads. To fix this vulnerability, users should upgrade Mattermost to version 11.0 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-41436.

In Discourse versions prior to 3.6.2 and 3.6.0.beta2 a medium severity vulnerability CVE-2025-61598 was identified. The default Cache-Control response header with value no-store, no-cache was missing from error responses, which could result in unintended caching by proxies and potentially enable cache poisoning attacks. To fix this issue, users should upgrade to Discourse 3.6.2 or 3.6.0.beta2. For more details, visit https://avd.aquasec.com/nvd/2025/cve-2025-61598.

In Mastodon versions 4.2.27 through 4.2.x, 4.3.0 through 4.3.14, and 4.4.0 through 4.4.6 a medium severity vulnerability CVE-2025-62176 was detected. The streaming server serves public timeline events to clients with valid tokens even if they lack the read:statuses scope, allowing limited access to new public posts. To address this issue, users should upgrade Mastodon to versions 4.2.27, 4.3.14, or 4.4.6 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-62176.

In Mastodon versions 4.2.27 through 4.2.x, 4.3.0 through 4.3.14, and 4.4.0 through 4.4.6 a medium severity vulnerability CVE-2025-62175 was detected. Disabling or suspending user accounts does not disconnect them from the streaming API, allowing continued access to real-time updates. To address this issue, users should upgrade Mastodon to versions 4.2.27, 4.3.14, or 4.4.6 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-62175.

In Mastodon versions 4.2.27 through 4.2.x, 4.3.0 through 4.3.14, and 4.4.0 through 4.4.6 a low severity vulnerability CVE-2025-62174 was detected. Active sessions and access tokens are not revoked when a user’s password is reset via the command-line interface, allowing continued access to the account. To address this issue, users should upgrade Mastodon to versions 4.2.27, 4.3.14, or 4.4.6 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-62174.

In Mattermost versions 10.5.x through 10.5.10 and 10.11.x through 10.11.2 a low severity vulnerability CVE-2025-10545 was detected. Improper validation of guest user permissions allows attackers to add any team members to private channels via the /api/v4/channels/{channel_id}/members endpoint. To address this issue, users should upgrade to Mattermost versions 10.5.11, 10.11.3, or 10.12.0. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-10545.

In Mattermost versions 10.5.x through 10.5.10, 10.10.x through 10.10.2, and 10.11.x through 10.11.1 a high severity vulnerability CVE-2025-58073 was detected. Improper validation of the OAuth state parameter allows attackers to join any team on a Mattermost server, bypassing invite restrictions. To address this issue, users should upgrade to Mattermost versions 10.5.11, 10.10.3, 10.11.2, or 10.12.0. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-58073.

In Mattermost Desktop App versions up to 5.13.0 a medium severity vulnerability CVE-2025-55035 was detected. Improper handling of modal dialogs for servers using basic authentication allows an attacker to deny access to the Desktop App. By tricking a user into configuring a malicious server, a modal popup can be triggered that cannot be closed, effectively causing a denial of service. To address this issue, users should upgrade to Mattermost Desktop App version 5.13.1.0. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-55035.