TYPO3 Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability - CVE-2018-6905
The page module in TYPO3 before 8.7.11 and 9.1.0 has XSS via GLOBALS39TYPO3_CONF_VARS3939SYS3939sitename39 as demonstrated by an admin entering a crafted site name during the installation process.