CVE-2020-4027

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-01 · updated 2026-06-17
Weakness: CWE-74

Description

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 Data Center: from 7.5.0 before 7.5.1 — fixed in 7.5.1

How to fix

Upgrade to a fixed version: Atlassian Confluence 7.4.5; Atlassian Confluence Data Center 7.5.1. Check the vendor advisory for mitigations.

References

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