Filtered by vendor Mattermost
Subscriptions
Total
533 CVE
| CVE | Vendors | Products | Updated | CVSS v3.1 |
|---|---|---|---|---|
| CVE-2026-2461 | 1 Mattermost | 1 Mattermost Server | 2026-03-24 | 4.3 Medium |
| Mattermost Plugins versions <=11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised attacker with editor permission to modify comments created by other board members. Mattermost Advisory ID: MMSA-2025-00559 | ||||
| CVE-2026-2457 | 1 Mattermost | 1 Mattermost Server | 2026-03-24 | 4.3 Medium |
| Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to sanitize client-supplied post metadata which allows an authenticated attacker to spoof permalink embeds impersonating other users via crafted PUT requests to the post update API endpoint.. Mattermost Advisory ID: MMSA-2025-00569 | ||||
| CVE-2026-2458 | 1 Mattermost | 1 Mattermost Server | 2026-03-24 | 4.3 Medium |
| Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly validate team membership when searching channels which allows a removed team member to enumerate all public channels within a private team via the channel search API endpoint.. Mattermost Advisory ID: MMSA-2025-00568 | ||||
| CVE-2026-26246 | 1 Mattermost | 1 Mattermost Server | 2026-03-24 | 4.3 Medium |
| Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to bound memory allocation when processing PSD image files which allows an authenticated attacker to cause server memory exhaustion and denial of service via uploading a specially crafted PSD file. Mattermost Advisory ID: MMSA-2026-00572 | ||||
| CVE-2026-2578 | 1 Mattermost | 1 Mattermost Server | 2026-03-24 | 4.3 Medium |
| Mattermost versions 11.3.x <= 11.3.0 fail to preserve the redacted state of burn-on-read posts during deletion which allows channel members to access unrevealed burn-on-read message contents via the WebSocket post deletion event.. Mattermost Advisory ID: MMSA-2026-00579 | ||||
| CVE-2026-2462 | 1 Mattermost | 1 Mattermost Server | 2026-03-24 | 6.6 Medium |
| Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to restrict plugin installation on CI test instances with default admin credentials which allows an unauthenticated attacker to achieve remote code execution and exfiltrate sensitive configuration data including AWS and SMTP credentials via uploading a malicious plugin after changing the import directory. Mattermost Advisory ID: MMSA-2025-00528 | ||||
| CVE-2026-24458 | 1 Mattermost | 1 Mattermost Server | 2026-03-24 | 7.5 High |
| Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly handle very long passwords, which allows an attacker to overload the server CPU and memory via executing login attempts with multi-megabyte passwords. Mattermost Advisory ID: MMSA-2026-00587 | ||||
| CVE-2026-25783 | 1 Mattermost | 1 Mattermost Server | 2026-03-24 | 4.3 Medium |
| Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly validate User-Agent header tokens which allows an authenticated attacker to cause a request panic via a specially crafted User-Agent header. Mattermost Advisory ID: MMSA-2026-00586 | ||||
| CVE-2026-4265 | 1 Mattermost | 1 Mattermost Server | 2026-03-24 | 4.3 Medium |
| Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to validate team-specific upload_file permissions which allows a guest user to post files in channels where they lack upload_file permission via uploading files in a team where they have permission and reusing the file metadata in a POST request to a different team. Mattermost Advisory ID: MMSA-2025-00553 | ||||
| CVE-2026-25780 | 1 Mattermost | 2 Mattermost, Mattermost Server | 2026-03-24 | 4.3 Medium |
| Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to bound memory allocation when processing DOC files which allows an authenticated attacker to cause server memory exhaustion and denial of service via uploading a specially crafted DOC file.. Mattermost Advisory ID: MMSA-2026-00581 | ||||
| CVE-2026-21386 | 1 Mattermost | 2 Mattermost, Mattermost Server | 2026-03-24 | 4.3 Medium |
| Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to use consistent error responses when handling the /mute command which allows an authenticated team member to enumerate private channels they are not authorized to know about via differing error messages for nonexistent versus private channels. Mattermost Advisory ID: MMSA-2026-00588 | ||||
| CVE-2026-2455 | 1 Mattermost | 2 Mattermost, Mattermost Server | 2026-03-24 | 4.3 Medium |
| Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to canonicalize IPv4-mapped IPv6 addresses before reserved IP validation which allows an attacker to perform SSRF attacks against internal services via IPv4-mapped IPv6 literals (e.g., [::ffff:127.0.0.1]).. Mattermost Advisory ID: MMSA-2026-00585 | ||||
| CVE-2026-22545 | 1 Mattermost | 2 Mattermost, Mattermost Server | 2026-03-24 | 3.1 Low |
| Mattermost versions 10.11.x <= 10.11.10 fail to validate user's authentication method when processing account auth type switch which allows an authenticated attacker to change account password without confirmation via falsely claiming a different auth provider.. Mattermost Advisory ID: MMSA-2026-00583 | ||||
| CVE-2026-1046 | 1 Mattermost | 2 Mattermost, Mattermost Desktop | 2026-03-23 | 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-2024-43105 | 1 Mattermost | 1 Channel Export | 2026-03-17 | 4.3 Medium |
| Mattermost Plugin Channel Export versions <=1.0.0 fail to restrict concurrent runs of the /export command which allows a user to consume excessive resource by running the /export command multiple times at once. | ||||
| CVE-2026-1628 | 1 Mattermost | 2 Mattermost, Mattermost Desktop | 2026-03-05 | 4.6 Medium |
| Mattermost Desktop App versions <=5.13.3 fail to attach listeners restricting navigation to external sites within the Mattermost app which allows a malicious server to expose preload script functionality to untrusted servers via having a user open an external link in their Mattermost server. Mattermost Advisory ID: MMSA-2026-00596 | ||||
| CVE-2025-9079 | 1 Mattermost | 2 Mattermost, Mattermost Server | 2026-02-26 | 8 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-2025-58075 | 1 Mattermost | 2 Mattermost, Mattermost Server | 2026-02-26 | 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-2025-58073 | 1 Mattermost | 2 Mattermost, Mattermost Server | 2026-02-26 | 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-2025-12419 | 1 Mattermost | 2 Mattermost, Mattermost Server | 2026-02-26 | 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. | ||||