CVE-2017-18107: Atlassian Crowd

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Various resources in the Crowd Demo application of Atlassian Crowd before version 3.1.1 allow remote attackers to modify add, modify and delete users & groups via a Cross-site request forgery (CSRF) vulnerability. Please be aware that the Demo application is not enabled by default.

Affected products

• Atlassian Crowd: before 3.1.1 (fixed in 3.1.1)

Published 2019-12-17. Last modified 2026-06-17.