Vulnerabilities (CVE)

Filtered by vendor Mattermost Subscribe
Filtered by product Mattermost Server
Total 501 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2025-25279 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 9.9 CRITICAL
Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to properly validate board blocks when importing boards which allows an attacker could read any arbitrary file on the system via importing and exporting a specially crafted import archive in Boards.
CVE-2025-25274 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 4.3 MEDIUM
Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to restrict command execution in archived channels, which allows authenticated users to run commands in archived channels.
CVE-2025-25068 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 7.5 HIGH
Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to enforce MFA on plugin endpoints, which allows authenticated attackers to bypass MFA protections via API requests to plugin-specific routes.
CVE-2025-24920 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 4.3 MEDIUM
Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark creation and updates in archived channels, which allows authenticated users created or update bookmarked in archived channels
CVE-2025-24866 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 2.7 LOW
Mattermost versions 9.11.x <= 9.11.8  fail to enforce proper access controls on the /api/v4/audits endpoint, allowing users with delegated granular administration roles who lack access to Compliance Monitoring to retrieve User Activity Logs.
CVE-2025-24839 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.1 LOW
Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to prevent Wrangler posts from triggering AI responses. This vulnerability allows users without access to the AI bot to activate it by attaching the activate_ai override property to a post via the Wrangler plugin, provided both the AI and Wrangler plugins are enabled.
CVE-2025-24526 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 4.3 MEDIUM
Mattermost versions 10.1.x <= 10.1.3, 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to restrict channel export of archived channels when the "Allow users to view archived channels" is disabled which allows a user to export channel contents when they shouldn't have access to it
CVE-2025-24490 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 9.6 CRITICAL
Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to use prepared statements in the SQL query of boards reordering which allows an attacker to retrieve data from the database, via a SQL injection when reordering specially crafted boards categories.
CVE-2025-22449 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.8 LOW
Mattermost versions 9.11.x <= 9.11.5 fail to enforce invite permissions, which allows team admins, with no permission to invite users to their team, to invite users by updating the "allow_open_invite" field via making their team public.
CVE-2025-22445 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.5 LOW
Mattermost versions 10.x <= 10.2 fail to accurately reflect missing settings, which allows confusion for admins regarding a Calls security-sensitive configuration via incorrect UI reporting.
CVE-2025-21088 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 6.5 MEDIUM
Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input.
CVE-2025-20621 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 6.5 MEDIUM
Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly handle posts with attachments containing fields that cannot be cast to a String, which allows an attacker to cause the webapp to crash via creating and sending such a post to a channel.
CVE-2025-20088 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 6.5 MEDIUM
Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.
CVE-2025-20086 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 6.5 MEDIUM
Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.
CVE-2025-20051 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 9.9 CRITICAL
Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to properly validate input when patching and duplicating a board, which allows a user to read any arbitrary file on the system via duplicating a specially crafted block in Boards.
CVE-2025-20033 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 4.3 MEDIUM
Mattermost versions 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post types, which allows attackers to deny service to users with the sysconsole_read_plugins permission via creating a post with the custom_pl_notification type and specific props.
CVE-2025-1792 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.1 LOW
Mattermost versions 10.7.x <= 10.7.0, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fail to properly enforce access controls for guest users accessing channel member information, allowing authenticated guest users to view metadata about members of public channels via the channel members API endpoint.
CVE-2025-1472 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 4.3 MEDIUM
Mattermost versions 9.11.x <= 9.11.8 fail to properly perform authorization of the Viewer role which allows an attacker with the Viewer role configured with No Access to Reporting to still view team and site statistics.
CVE-2025-1412 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.1 LOW
Mattermost versions 9.11.x <= 9.11.6, 10.4.x <= 10.4.1 fail to invalidate all active sessions when converting a user to a bot, with allows the converted user to escalate their privileges depending on the permissions granted to the bot.
CVE-2025-14822 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.1 LOW
Mattermost versions 10.11.x <= 10.11.8 fail to validate input size before processing hashtags which allows an authenticated attacker to exhaust CPU resources via a single HTTP request containing a post with thousands space-separated tokens