Filtered by vendor Mattermost
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Total
660 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| 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 | |||||
| CVE-2025-13870 | 1 Mattermost | 1 Mattermost Server | 2026-10-18 | N/A | 3.1 LOW |
| Mattermost versions 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to | |||||
| CVE-2026-1046 | 1 Mattermost | 1 Mattermost Desktop | 2026-10-15 | N/A | 7.6 HIGH |
| Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on certain items in the Help menu Mattermost Advisory ID: MMSA-2026-00577 | |||||
| CVE-2026-9602 | 1 Mattermost | 1 Mattermost Desktop | 2026-10-15 | N/A | 6.5 MEDIUM |
| Mattermost Desktop App versions <=6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the Desktop App which allows a malicious server owner to crash the Mattermost Desktop App via changing the payload of a method to a malformed one. Mattermost Advisory ID: MMSA-2026-00678 | |||||
| CVE-2026-8075 | 1 Mattermost | 1 Mattermost Desktop | 2026-10-15 | N/A | 6.5 MEDIUM |
| Mattermost Desktop App versions <=6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop App via posting a malicious link with an embedded image that misses one of those headers. Mattermost Advisory ID: MMSA-2026-00668 | |||||
| CVE-2026-6346 | 1 Mattermost | 1 Mattermost Server | 2026-10-14 | N/A | 8.7 HIGH |
| Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to sanitize sensitive configuration fields before including them in support packet generation, which allows a Mattermost System Admin or any party with access to a support packet to obtain sensitive credentials in plaintext via downloading a support packet from the System Console.. Mattermost Advisory ID: MMSA-2026-00607 | |||||
| CVE-2026-6339 | 1 Mattermost | 1 Mattermost Server | 2026-10-14 | N/A | 4.3 MEDIUM |
| Mattermost versions 11.5.x <= 11.5.1, 11.4.x <= 11.4.3 fail to validate the X-Requested-With header on the burn-on-read reveal endpoint which allows an authenticated channel member to force the reveal of a burn-on-read message without recipient consent via a crafted Markdown image tag.. Mattermost Advisory ID: MMSA-2026-00636 | |||||
| CVE-2026-4273 | 1 Mattermost | 1 Mattermost Server | 2026-10-14 | N/A | 3.7 LOW |
| Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to validate that the RefreshedToken differs from the original invite token during remote cluster invite confirmation which allows an authenticated attacker to bypass token rotation and reuse the original invite token via sending a crafted invite confirmation with a RefreshedToken matching the original token. Mattermost Advisory ID: MMSA-2026-00575 | |||||
| CVE-2026-4286 | 1 Mattermost | 1 Mattermost Server | 2026-10-14 | N/A | 3.1 LOW |
| Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permission to change a playbook's team, bypassing manage members restriction via PUT api. Mattermost Advisory ID: MMSA-2025-00552 | |||||
| CVE-2026-6341 | 1 Mattermost | 1 Mattermost Server | 2026-10-14 | N/A | 4.3 MEDIUM |
| Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to have API-level checks on which groups the user can create issues or attach comments to which allows a user that is member of multiple groups to create issues to a locked group via direct API requests. Mattermost Advisory ID: MMSA-2026-00602 | |||||
| CVE-2026-6340 | 1 Mattermost | 1 Mattermost Server | 2026-10-14 | N/A | 4.3 MEDIUM |
| Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate 7zip archive structure before processing which allows an authenticated attacker to cause server memory exhaustion and denial of service via uploading a specially crafted 7zip file with excessive folder declarations.. Mattermost Advisory ID: MMSA-2026-00573 | |||||
| CVE-2026-3637 | 1 Mattermost | 1 Mattermost Server | 2026-10-14 | N/A | 4.3 MEDIUM |
| Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to check the create_post channel permission during post edit operations which allows an authenticated attacker with revoked posting privileges to modify their existing posts via direct API requests to the post update and patch endpoints.. Mattermost Advisory ID: MMSA-2026-00627 | |||||
| CVE-2026-6333 | 1 Mattermost | 1 Mattermost Server | 2026-10-14 | N/A | 3.5 LOW |
| Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost Advisory ID: MMSA-2026-00582 | |||||
| CVE-2026-6345 | 1 Mattermost | 1 Mattermost Server | 2026-10-14 | N/A | 6.5 MEDIUM |
| Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail prevent disclosure of created user password which allows a malicious attacker to impersonate a user via the use of some of those passwords.. Mattermost Advisory ID: MMSA-2026-00614 | |||||
| CVE-2026-5163 | 1 Mattermost | 1 Mattermost Server | 2026-10-14 | N/A | 6.5 MEDIUM |
| Mattermost versions 11.5.x <= 11.5.1 fail to verify channel membership when processing AI-assisted message rewrites which allows an authenticated attacker to read the content of threads in private channels and direct messages they do not have access to via a crafted request to the post rewrite endpoint.. Mattermost Advisory ID: MMSA-2026-00645 | |||||
| CVE-2026-28759 | 1 Mattermost | 1 Mattermost Server | 2026-10-14 | N/A | 4.3 MEDIUM |
| Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate that a remote cluster has access to a channel before processing membership removal requests during shared channel membership sync, which allows a malicious remote cluster to remove any user from any channel, including private channels, via crafted membership sync messages targeting channels the remote cluster is not authorized to access. Mattermost Advisory ID: MMSA-2026-00576 | |||||