CVE-2017-16856: Atlassian Confluence

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

The RSS Feed macro in Atlassian Confluence before version 6.5.2 allows remote attackers to inject arbitrary HTML or JavaScript via cross site scripting (XSS) vulnerabilities in various rss properties which were used as links without restriction on their scheme.

Affected products

• Atlassian Confluence: before 6.5.2 (fixed in 6.5.2)

Published 2017-12-05. Last modified 2026-06-17.