CVE-2018-20238: Atlassian Crowd

High severity, CVSS 8.1. EPSS: 1.5% chance of exploitation in the next 30 days.

Various rest resources in Atlassian Crowd before version 3.2.7 and from version 3.3.0 before version 3.3.4 allow remote attackers to authenticate using an expired user session via an insufficient session expiration vulnerability.

Affected products

• Atlassian Crowd: before 3.2.7 (fixed in 3.2.7); from 3.3.0, before 3.3.4 (fixed in 3.3.4)

Published 2019-02-13. Last modified 2026-06-17.