Description
Contao is an Open Source CMS. In versions starting from 5.0.0 and prior to 5.3.38 and 5.6.1, if a news feed contains protected news archives, their news items are not filtered and become publicly available in the RSS feed. This issue has been patched in versions 5.3.38 and 5.6.1. A workaround involves not adding protected news archives to the news feed page.
Remediation
References
Related Vulnerabilities
Ruby on Rails Permissions, Privileges, and Access Controls Vulnerability (CVE-2011-0449)
MySQL CVE-2013-3812 Vulnerability (CVE-2013-3812)
WordPress Plugin Twitter Button by BestWebSoft Multiple Cross-Site Scripting Vulnerabilities (2.36)
Python Uncontrolled Resource Consumption Vulnerability (CVE-2021-3733)