Mattermost Ms Teams vulnerabilities

2 vulnerabilities

Known vulnerabilities in Mattermost Ms Teams, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.

5.9CVE-2025-27936chainguardmattermost-fips-10.5+9
EPSS score
0.34%
Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.7.6CVE-2026-2476github.com/mattermostmattermost-plugin-msteams+2
EPSS score
0.18%
Mattermost Plugins versions <=2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID: MMSA-2026-00606