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Mattermost

626 known vulnerabilities

21
CRITICAL
90
HIGH
384
MEDIUM
128
LOW

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mattermost server 467 mattermost 77 mattermost desktop 31 mattermost mobile 21 confluence 14 legal hold 2 focalboard 2 ms teams 2 zoom 2 playbooks 2
623 CVEs · Page 5/13
4.3
CVE-2025-3228

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to pr

4.3
CVE-2025-3227

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to pr

9.9
CVE-2025-4981

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to sa

4.1
CVE-2025-4573

Mattermost versions 10.7.x <= 10.7.1, 10.6.x <= 10.6.3, 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly validate LD

3.1
CVE-2025-4128

Mattermost versions 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly restrict API access to team information, allowi

3.1
CVE-2025-3611

Mattermost versions 10.7.x <= 10.7.0, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fails to properly enforce access control restr

5.4
CVE-2025-3230

Mattermost versions 10.7.x <= 10.7.0, 10.6.x <= 10.6.2, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fails to properly invalidate

4.2
CVE-2025-2571

Mattermost versions 10.7.x <= 10.7.0, 10.6.x <= 10.6.2, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fail to clear Google OAuth c

3.1
CVE-2025-1792

Mattermost versions 10.7.x <= 10.7.0, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fail to properly enforce access controls for g

5.3
CVE-2025-3913

Mattermost versions 10.7.x <= 10.7.0, 10.6.x <= 10.6.2, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fail to properly validate pe

2.7
CVE-2025-2570

Mattermost versions 10.5.x <= 10.5.3, 9.11.x <= 9.11.11 fail to check `RestrictSystemAdmin` setting if user doesn't have

4.3
CVE-2025-2527

Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions when accessing gr

4.3
CVE-2025-3446

Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct pe

5.8
CVE-2025-31947

Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to lockout LDAP users f

3.1
CVE-2025-41423

Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to properly validate permissions for the

6.5
CVE-2025-41395

Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to properly validate the props used by th

6.5
CVE-2025-35965

Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to validate the uniqueness and quantity o

4.3
CVE-2025-2564

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to properly enforce the 'Allow users to vi

3.0
CVE-2025-31363

Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.9 fail to restrict domains the LLM can request to

5.3
CVE-2025-27936

Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enable

4.3
CVE-2025-27571

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to check the "Allow Users to View Archived

2.2
CVE-2025-27538

Mattermost versions 10.5.x <= 10.5.1, 9.11.x <= 9.11.9 fail to enforce MFA checks in PUT /api/v4/users/user-id/mfa when

3.1
CVE-2025-24839

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to prevent Wrangler posts from triggering

5.4
CVE-2025-2475

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to invalidate the cache when a user accoun

3.1
CVE-2025-2424

Mattermost versions 10.5.x <= 10.5.1, 9.11.x <= 9.11.9 fail to check if a file has been deleted when creating a bookmark

4.7
CVE-2025-32093

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to restrict certain operations on system a

2.0
CVE-2025-30516

Mattermost Mobile Apps versions <=2.25.0  fail to terminate sessions during logout under certain conditions (e.g. poor c

2.7
CVE-2025-24866

Mattermost versions 9.11.x <= 9.11.8  fail to enforce proper access controls on the /api/v4/audits endpoint, allowing us

6.5
CVE-2025-1558

Mattermost Mobile Apps versions <=2.25.0 fail to properly validate GIF images prior to rendering which allows a maliciou

4.3
CVE-2025-30179

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to enforce MFA on certain search APIs, whi

5.4
CVE-2025-27933

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to fail to enforce channel conversion rest

3.3
CVE-2025-27715

Mattermost versions 9.11.x <= 9.11.8 fail to prompt for explicit approval before adding a team admin to a private channe

4.3
CVE-2025-25274

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to restrict command execution in archived

7.5
CVE-2025-25068

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to enforce MFA on plugin

4.3
CVE-2025-24920

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark cre

4.3
CVE-2025-1472

Mattermost versions 9.11.x <= 9.11.8 fail to properly perform authorization of the Viewer role which allows an attacker

3.3
CVE-2025-1398

Mattermost Desktop App versions <=5.10.0 explicitly declared unnecessary macOS entitlements which allows an attacker wit

9.9
CVE-2025-25279

Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to properly validate boa

4.3
CVE-2025-24526

Mattermost versions 10.1.x <= 10.1.3, 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to res

9.6
CVE-2025-24490

Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to use prepared statemen

9.9
CVE-2025-20051

Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to properly validate inp

3.1
CVE-2025-1412

Mattermost versions 9.11.x <= 9.11.6, 10.4.x <= 10.4.1 fail to invalidate all active sessions when converting a user to

3.1
CVE-2025-0503

Mattermost versions 9.11.x <= 9.11.6 fail to filter out DMs from the deleted channels endpoint which allows an attacker

6.5
CVE-2025-20630

Mattermost Mobile versions <=2.22.0 fail to properly handle posts with attachments containing fields that cannot be cast

6.5
CVE-2025-20621

Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly handle posts

6.5
CVE-2025-20072

Mattermost Mobile versions <= 2.22.0 fail to properly validate the style of proto supplied to an action's style in post.

4.3
CVE-2025-0476

Mattermost Mobile Apps versions <=2.22.0 fail to properly handle specially crafted attachment names, which allows an att

6.5
CVE-2025-21083

Mattermost Mobile Apps versions <=2.22.0 fail to properly validate post props which allows a malicious authenticated use

6.5
CVE-2025-20088

Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate pos

6.5
CVE-2025-20086

Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate pos

Frequently Asked Questions

How many CVEs affect Mattermost?

Mattermost has 626 CVE records in our database, including 21 critical and 90 high severity vulnerabilities.

What are the most severe Mattermost vulnerabilities?

Mattermost has 21 critical severity (CVSS 9.0+) and 90 high severity (CVSS 7.0-8.9) vulnerabilities. Review the list above sorted by publication date to find the most recent high-severity issues.

How can I scan for Mattermost vulnerabilities?

CyberStrike's AI-powered security agents automatically detect vulnerabilities in Mattermost products across your infrastructure. The platform provides continuous pentesting, DAST scanning, and real-time vulnerability monitoring with actionable remediation guidance.

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