Vulnerabilities (CVE)

Filtered by vendor Mattermost Subscribe
Filtered by product Mattermost Server
Total 501 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2025-14573 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.8 LOW
Mattermost versions 10.11.x <= 10.11.9 fail to enforce invite permissions when updating team settings, which allows team administrators without proper permissions to bypass restrictions and add users to their team via API requests. Mattermost Advisory ID: MMSA-2025-00561
CVE-2025-14435 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 6.8 MEDIUM
Mattermost versions 10.11.x <= 10.11.8, 11.1.x <= 11.1.1, 11.0.x <= 11.0.6 fail to prevent infinite re-renders on API errors which allows authenticated users to cause application-level DoS via triggering unbounded component re-render loops.
CVE-2025-14350 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 4.3 MEDIUM
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the channel_mentions property in the API response. Mattermost Advisory ID: MMSA-2025-00563
CVE-2025-13821 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 5.7 MEDIUM
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to sanitize sensitive data in WebSocket messages which allows authenticated users to exfiltrate password hashes and MFA secrets via profile nickname updates or email verification events. Mattermost Advisory ID: MMSA-2025-00560
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.
CVE-2024-4183 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 4.3 MEDIUM
Mattermost versions 8.1.x before 8.1.12, 9.6.x before 9.6.1, 9.5.x before 9.5.3, 9.4.x before 9.4.5 fail to limit the number of active sessions, which allows an authenticated attacker to crash the server via repeated requests to the getSessions API after flooding the sessions table.
CVE-2024-4182 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 4.3 MEDIUM
Mattermost versions 9.6.0, 9.5.x before 9.5.3, 9.4.x before 9.4.5, and 8.1.x before 8.1.12 fail to handle JSON parsing errors in custom status values, which allows an authenticated attacker to crash other users' web clients via a malformed custom status.
CVE-2024-48872 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 4.8 MEDIUM
Mattermost versions 10.1.x <= 10.1.2, 10.0.x <= 10.0.2, 9.11.x <= 9.11.4, and 9.5.x <= 9.5.12 fail to prevent concurrently checking and updating the failed login attempts. which allows an attacker to bypass of "Max failed attempts" restriction and send a big number of login attempts before being blocked via simultaneously sending multiple login requests
CVE-2024-47401 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 and 9.5.x <= 9.5.9 fail to prevent detailed error messages from being displayed in Playbooks which allows an attacker to generate a large response and cause an amplified GraphQL response which in turn could cause the application to crash by sending a specially crafted request to Playbooks.
CVE-2024-47145 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.1 LOW
Mattermost versions 9.5.x <= 9.5.8 fail to properly authorize access to archived channels when viewing archived channels is disabled, which allows an attacker to view posts and files of archived channels via file links.
CVE-2024-47003 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.1 LOW
Mattermost versions 9.11.x <= 9.11.0 and 9.5.x <= 9.5.8 fail to validate that the message of the permalink post is a string, which allows an attacker to send a non-string value as the message of a permalink post and crash the frontend.