CVE-2020-4027: Atlassian Confluence

Medium severity, CVSS 4.7. EPSS: 1.5% chance of exploitation in the next 30 days.

Affected versions of Atlassian Confluence Server and Data Center allowed remote attackers with system administration permissions to bypass velocity template injection mitigations via an injection vulnerability in custom user macros. The affected versions are before version 7.4.5, and from version 7.5.0 before 7.5.1.

Affected products

• Atlassian Confluence: before 7.4.5 (fixed in 7.4.5)
• Atlassian Confluence Server: from 7.5.0, before 7.5.1 (fixed in 7.5.1)

Published 2020-07-01. Last modified 2026-06-17.