Priority MEDIUM 64
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 board blocks when importing boards which allows an attacker could read any arbitrary file on the system…
CVSS 3.1CRITICAL 9.9· Network · Low privileges · No interaction · EPSS 0.24223 · Published 2025-02-24 · Fixed in 10.5.0, 10.4.2 +4 CWE-22
Priority MEDIUM 46
An issue was discovered in Mattermost Packages before 5.16.3.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.02232 · Published 2020-06-19 · No fix listed CWE-668
Priority MEDIUM 45
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 sanitize filenames in the archive extractor which allows authenticated users to write files to arbitra…
CVSS 3.1CRITICAL 9.9· Network · Low privileges · No interaction · EPSS 0.01016 · Published 2025-06-20 · Fixed in 10.9.0, 10.5.6 +6 CWE-427
Priority MEDIUM 45
An issue was discovered in Mattermost Desktop App before 4.3.0 on macOS.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01444 · Published 2020-06-19 · No fix listed CWE-427
Priority MEDIUM 45
An issue was discovered in Mattermost Server before 3.6.2.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01239 · Published 2020-06-19 · No fix listed
Priority MEDIUM 45
An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01387 · Published 2020-06-19 · Fixed in 3.7.4-0.20170404171331-0b5c0794fdcb CWE-22
Priority MEDIUM 45
An issue was discovered in Mattermost Server before 4.1.0, 4.0.4, and 3.10.3.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01296 · Published 2020-06-19 · Fixed in 3.10.3, 4.0.3 CWE-74
Priority MEDIUM 45
An issue was discovered in Mattermost Desktop App before 3.4.0.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01285 · Published 2020-06-19 · No fix listed CWE-94
Priority MEDIUM 44
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 input when patching and duplicating a board, which allows a user to read any arbitrary file on the syst…
CVSS 3.1CRITICAL 9.9· Network · Low privileges · No interaction · EPSS 0.00611 · Published 2025-02-24 · Fixed in 10.5.0, 10.4.2 +4 CWE-22
Priority MEDIUM 44
An issue was discovered in Mattermost Server before 5.2 and 5.1.1.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01197 · Published 2020-06-19 · No fix listed CWE-862
Priority MEDIUM 44
An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01184 · Published 2020-06-19 · Fixed in 3.6.7-0.20170420152529-0968e4079e0a, 3.7.5 +1 CWE-276
Priority MEDIUM 44
An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01184 · Published 2020-06-19 · Fixed in 3.9.1-rc1, 3.10.1 CWE-287
Priority MEDIUM 44
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01112 · Published 2020-06-19 · Fixed in 4.1.2, 4.2.1 +1 CWE-89
Priority MEDIUM 44
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01184 · Published 2020-06-19 · Fixed in 4.1.2, 4.2.1 +1 CWE-269
Priority MEDIUM 44
An issue was discovered in Mattermost Server before 3.0.0.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01184 · Published 2020-06-19 · Fixed in 3.0.0 CWE-287
Priority MEDIUM 43
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via sys…
CVSS 3.1CRITICAL 9.9· Network · Low privileges · No interaction · EPSS 0.00327 · Published 2026-05-21 · Fixed in 11.7.0, 11.6.1 +3 CWE-22
Priority MEDIUM 43
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to handle incorrectly reported array lengths which allows malicious user to cause OOM errors and crash the server via sending corrupted msg…
CVSS 3.1HIGH 8.6· Network · No auth · No interaction · EPSS 0.00291 · Published 2026-03-16 · Fixed in 11.4.0, 11.3.1 +2 CWE-1287
Priority MEDIUM 43
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 statements in the SQL query of boards reordering which allows an attacker to retrieve data from the database…
CVSS 3.1CRITICAL 9.6· Network · Low privileges · No interaction · EPSS 0.00508 · Published 2025-02-24 · Fixed in 10.4.2, 9.11.8 +2 CWE-89
Priority MEDIUM 43
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…
CVSS 3.1CRITICAL 9.9· Network · Low privileges · No interaction · EPSS 0.00446 · Published 2025-11-27 · Fixed in 11.1.0, 11.0.3 +4 CWE-303
Priority MEDIUM 43
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 wit…
CVSS 3.1CRITICAL 9.9· Network · Low privileges · No interaction · EPSS 0.00367 · Published 2025-11-27 · Fixed in 11.1.0, 10.12.2 +4 CWE-303
Priority MEDIUM 43
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to disallow unsolicited invites to expose access to local channels, when shared channels are enabled, which allows a malicious re…
CVSS 3.1CRITICAL 9.6· Network · Low privileges · No interaction · EPSS 0.00363 · Published 2024-08-01 · Fixed in 9.10.0, 9.9.1 +4 CWE-284
Priority MEDIUM 43
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.00643 · Published 2023-12-06 · Fixed in 9.1.2, 9.0.3 +2 CWE-74
Priority MEDIUM 42
Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7 Mattermost failed to validate Dynamic Client Registration redirect URIs by URL component (matching glob patterns against the raw URI string instead…
CVSS 3.1CRITICAL 9.3· Network · No auth · User interaction · EPSS 0.00268 · Published 2026-09-14 · Fixed in 11.10.0, 11.9.1 +2 CWE-601
Priority MEDIUM 42
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 with the Jira plugin enabled and Mattermost Jira plugin versions <=4.4.0 fail to enforce authentication and issue-key path re…
CVSS 3.1HIGH 8.3· Network · No auth · No interaction · EPSS 0.00263 · Published 2025-12-22 · Fixed in 11.2.0, 11.1.1 +5 CWE-303
Priority MEDIUM 42
Mattermost versions 10.0.x <= 10.0.1, 10.1.x <= 10.1.1, 9.11.x <= 9.11.3, 9.5.x <= 9.5.11 fail to properly validate email addresses which allows an unauthenticated user to bypass email domain restrictions via carefully c…
CVSS 3.1HIGH 8.2· Network · No auth · No interaction · EPSS 0.00468 · Published 2024-11-28 · Fixed in 10.2.0, 10.0.2 +3 CWE-754
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