Known Vulnerabilities for Mattermost Server by Mattermost

Listed below are 10 of the newest known vulnerabilities associated with "Mattermost Server" by "Mattermost".

These CVEs are retrieved based on exact matches on listed software, hardware, and vendor information (CPE data) as well as a keyword search to ensure the newest vulnerabilities with no officially listed software information are still displayed.

Data on known vulnerable versions is also displayed based on information from known CPEs

Known Vulnerabilities

CVE Shortened Description Severity Publish Date Last Modified
CVE-2026-3115 Not Provided 2026-03-26 2026-03-30
CVE-2026-3114 Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to validate decompressed a... Not Provided 2026-03-26 2026-03-26
CVE-2026-3113 Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to set permissions on down... Not Provided 2026-03-26 2026-03-26
CVE-2026-3112 Not Provided 2026-03-26 2026-03-30
CVE-2026-3108 Not Provided 2026-03-26 2026-03-30
CVE-2021-37863 Mattermost 6.0 and earlier fails to sufficiently validate parameters during post creation, which allows authenticated attacke... 5.7 - MEDIUM 2021-12-17 2021-12-21
CVE-2021-37862 Mattermost 6.0 and earlier fails to sufficiently validate the email address during registration, which allows attackers to tr... 5.4 - MEDIUM 2021-12-17 2021-12-27
CVE-2020-14450 An issue was discovered in Mattermost Server before 5.22.0. The markdown renderer allows attackers to cause a denial of servi... 7.5 - HIGH 2020-06-19 2020-06-19
CVE-2020-14448 An issue was discovered in Mattermost Server before 5.23.0. Automatic direct message replies allow attackers to cause a denia... 7.5 - HIGH 2020-06-19 2020-06-20
CVE-2020-14447 An issue was discovered in Mattermost Server before 5.23.0. Large webhook requests allow attackers to cause a denial of servi... 7.5 - HIGH 2020-06-19 2020-06-19
Results limited to 10 most recent vulnerabilities

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationMattermostMattermost Server5.9.8AllAllAll
ApplicationMattermostMattermost Server5.9.8rc1AllAll
ApplicationMattermostMattermost Server5.9.7AllAllAll
ApplicationMattermostMattermost Server5.9.7rc1AllAll
ApplicationMattermostMattermost Server5.9.6AllAllAll
ApplicationMattermostMattermost Server5.9.6rc1AllAll
ApplicationMattermostMattermost Server5.9.5AllAllAll
ApplicationMattermostMattermost Server5.9.5rc1AllAll
ApplicationMattermostMattermost Server5.9.4AllAllAll
ApplicationMattermostMattermost Server5.9.4rc1AllAll
ApplicationMattermostMattermost Server5.9.3AllAllAll
ApplicationMattermostMattermost Server5.9.3rc1AllAll
ApplicationMattermostMattermost Server5.9.2AllAllAll
ApplicationMattermostMattermost Server5.9.2rc1AllAll
ApplicationMattermostMattermost Server5.9.1AllAllAll
ApplicationMattermostMattermost Server5.9.1rc1AllAll
ApplicationMattermostMattermost Server5.9.0AllAllAll
ApplicationMattermostMattermost Server5.9.0rc1AllAll
ApplicationMattermostMattermost Server5.9.0rc2AllAll
ApplicationMattermostMattermost Server5.9.0rc3AllAll
Results limited to 20 most recent known configurations
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