Total
501 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2025-9078 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 4.3 MEDIUM |
| Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to properly validate cache keys for link metadata which allows authenticated users to access unauthorized posts and poison link previews via hash collision attacks on FNV-1 hashing | |||||
| CVE-2025-58075 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 8.1 HIGH |
| Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the RelayState | |||||
| CVE-2025-41443 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 4.3 MEDIUM |
| Mattermost versions 10.5.x <= 10.5.12, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when accessing channel information which allows guest users to discover active public channels and their metadata via the `/api/v4/teams/{team_id}/channels/ids` endpoint | |||||
| CVE-2025-58073 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 8.1 HIGH |
| Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the OAuth state. | |||||
| CVE-2025-41410 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 5.4 MEDIUM |
| Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions | |||||
| CVE-2025-9079 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 8.0 HIGH |
| Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to validate import directory path configuration which allows admin users to execute arbitrary code via malicious plugin upload to prepackaged plugins directory | |||||
| CVE-2025-54499 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 3.1 LOW |
| Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to use constant-time comparison for sensitive string comparisons which allows attackers to exploit timing oracles to perform byte-by-byte brute force attacks via response time analysis on Cloud API keys and OAuth client secrets | |||||
| CVE-2025-9081 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 3.1 LOW |
| Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate access controls which allows any authenticated user to download sensitive files via board file download endpoint using UUID enumeration | |||||
| CVE-2025-10545 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 3.1 LOW |
| Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the `/api/v4/channels/{channel_id}/members` endpoint | |||||
| CVE-2025-11776 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 4.3 MEDIUM |
| Mattermost versions <11 fail to properly restrict access to archived channel search API which allows guest users to discover archived public channels via the `/api/v4/teams/{team_id}/channels/search_archived` endpoint | |||||
| CVE-2025-12419 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 9.9 CRITICAL |
| Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost. | |||||
| CVE-2025-12421 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 9.9 CRITICAL |
| Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to to verify that the token used during the code exchange originates from the same authentication flow, which allows an authenticated user to perform account takeover via a specially crafted email address used when switching authentication methods and sending a request to the /users/login/sso/code-exchange endpoint. The vulnerability requires ExperimentalEnableAuthenticationTransfer to be enabled (default: enabled) and RequireEmailVerification to be disabled (default: disabled). | |||||
| CVE-2025-55074 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 3.0 LOW |
| Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects | |||||
| CVE-2025-12756 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 4.3 MEDIUM |
| Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users. | |||||
| CVE-2025-55070 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 6.5 MEDIUM |
| Mattermost versions <11 fail to enforce multi-factor authentication on WebSocket connections which allows unauthenticated users to access sensitive information via WebSocket events | |||||
| CVE-2025-12559 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 4.3 MEDIUM |
| Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint | |||||
| CVE-2025-11794 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 4.9 MEDIUM |
| Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to sanitize user data which allows system administrators to access password hashes and MFA secrets via the POST /api/v4/users/{user_id}/email/verify/member endpoint | |||||
| CVE-2025-11777 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 3.1 LOW |
| Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows users from one team to access user metadata and channel membership information from other teams via the API endpoint | |||||
| CVE-2025-55073 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 5.4 MEDIUM |
| Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL. | |||||
| CVE-2025-41436 | 1 Mattermost | 1 Mattermost Server | 2026-10-19 | N/A | 3.1 LOW |
| Mattermost versions <11.0 fail to properly enforce the "Allow users to view archived channels" setting which allows regular users to access archived channel content and files via the "Open in Channel" functionality from followed threads | |||||