Total
467 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2025-13324 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 3.7 LOW |
| Mattermost versions 10.11.x <= 10.11.5, 11.0.x <= 11.0.4, 10.12.x <= 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (version 1) protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to authenticate as the remote cluster and perform limited actions on shared channels even after the invitation has been legitimately confirmed. | |||||
| CVE-2025-12756 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | 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-2025-12689 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 6.5 MEDIUM |
| Mattermost versions 11.0.x <= 11.0.4, 10.12.x <= 10.12.2, 10.11.x <= 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request. | |||||
| CVE-2025-12559 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | 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-2025-12421 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | 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-2025-12419 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | 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-2025-11794 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | 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 | 2026-06-17 | 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-2025-11776 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | 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-2025-10545 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | 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-2025-0503 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 3.1 LOW |
| Mattermost versions 9.11.x <= 9.11.6 fail to filter out DMs from the deleted channels endpoint which allows an attacker to infer user IDs and other metadata from deleted DMs if someone had manually marked DMs as deleted in the database. | |||||
| CVE-2024-9155 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 4.3 MEDIUM |
| Mattermost versions 9.10.x <= 9.10.1, 9.9.x <= 9.9.2, 9.5.x <= 9.5.8 fail to limit access to channels files that have not been linked to a post which allows an attacker to view them in channels that they are a member of. | |||||
| CVE-2024-5272 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 4.3 MEDIUM |
| Mattermost versions 9.5.x <= 9.5.3, 9.6.x <= 9.6.1, 8.1.x <= 8.1.12 fail to restrict the audience of the "custom_playbooks_playbook_run_updated" webhook event, which allows a guest on a channel with a playbook run linked to see all the details of the playbook run when the run is marked by finished. | |||||
| CVE-2024-5270 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 4.3 MEDIUM |
| Mattermost versions 9.5.x <= 9.5.3, 9.7.x <= 9.7.1, 9.6.x <= 9.6.1 and 8.1.x <= 8.1.12 fail to check if the email signup configuration option is enabled when a user requests to switch from SAML to Email. This allows the user to switch their authentication mail from SAML to email and possibly edit personal details that were otherwise non-editable and provided by the SAML provider. | |||||
| CVE-2024-54682 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 6.5 MEDIUM |
| Mattermost versions 10.1.x <= 10.1.2, 10.0.x <= 10.0.2, 9.11.x <= 9.11.4, 9.5.x <= 9.5.12 fail to limit the file size for slack import file uploads which allows a user to cause a DoS via zip bomb by importing data in a team they are a team admin. | |||||
| CVE-2024-54083 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 6.5 MEDIUM |
| Mattermost versions 10.1.x <= 10.1.2, 10.0.x <= 10.0.2, 9.11.x <= 9.11.4, 9.5.x <= 9.5.12 fail to properly validate the type of callProps which allows a user to cause a client side (webapp and mobile) DoS to users of particular channels, by sending a specially crafted post. | |||||
| CVE-2024-52032 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 4.3 MEDIUM |
| Mattermost versions 10.0.x <= 10.0.0 and 9.11.x <= 9.11.2 fail to properly query ElasticSearch when searching for the channel name in channel switcher which allows an attacker to get private channels names of channels that they are not a member of, when Elasticsearch v8 was enabled. | |||||
| CVE-2024-50052 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 4.3 MEDIUM |
| Mattermost versions 9.10.x <= 9.10.2, 9.11.x <= 9.11.1, 9.5.x <= 9.5.9 fail to check that the origin of the message in an integration action matches with the original post metadata which allows an authenticated user to delete an arbitrary post. | |||||
| CVE-2024-4198 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 2.7 LOW |
| Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes which allows an attacker authenticated as team admin to demote users to guest via crafted HTTP requests. | |||||
| CVE-2024-4195 | 1 Mattermost | 1 Mattermost Server | 2026-06-17 | N/A | 2.7 LOW |
| Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes, which allows an attacker authenticated as a team admin to promote guests to team admins via crafted HTTP requests. | |||||