CVE-2021-26072: Atlassian Confluence Data Center

Medium severity, CVSS 4.3. EPSS: 38.8% chance of exploitation in the next 30 days.

The WidgetConnector plugin in Confluence Server and Confluence Data Center before version 5.8.6 allowed remote attackers to manipulate the content of internal network resources via a blind Server-Side Request Forgery (SSRF) vulnerability.

Affected products

• Atlassian Confluence Data Center: before 5.8.6 (fixed in 5.8.6)
• Atlassian Confluence Server: before 5.8.6 (fixed in 5.8.6)

Published 2021-04-01. Last modified 2026-06-17.