Description
The page module in TYPO3 before 8.7.11, and 9.1.0, has XSS via $GLOBALS['TYPO3_CONF_VARS']['SYS']['sitename'], as demonstrated by an admin entering a crafted site name during the installation process.
Remediation
References
Related Vulnerabilities
WordPress Plugin List Pages Shortcode Cross-Site Scripting (1.7.4)
WordPress Plugin Add Link to Facebook Cross-Site Scripting (2.3)
WordPress Plugin Maintenance Mode Unspecified Vulnerability (1.3.3)
WordPress Plugin Oi Yandex.Maps for WordPress Cross-Site Scripting (3.2.7)
WordPress Plugin GeSHi Source Colorer Cross-Site Scripting (0.13)