CVE-2017-18902: Mattermost Server

Medium severity, CVSS 5.3. EPSS: 0.9% chance of exploitation in the next 30 days.

An issue was discovered in Mattermost Server before 4.1.0, 4.0.4, and 3.10.3. It allows attackers to discover team invite IDs via team API endpoints.

Affected products

• Mattermost Mattermost Server: before 3.10.3 (fixed in 3.10.3); from 4.0.0, before 4.0.4 (fixed in 4.0.4)

Published 2020-06-19. Last modified 2026-06-17.