CVE-2024-5270: Mattermost Server

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Mattermost Mattermost Server: from 8.1.0, before 8.1.13 (fixed in 8.1.13); from 9.5.0, before 9.5.4 (fixed in 9.5.4); from 9.6.0, before 9.6.2 (fixed in 9.6.2); from 9.7.0, before 9.7.2 (fixed in 9.7.2)

Published 2024-05-26. Last modified 2026-06-17.