Contao before 4.5.7 has XSS in the system log.
contao.org/en/news/contao-3_5_35.html
contao.org/en/news/contao-4_4_18.html
contao.org/en/security-advisories/cross-site-scripting-in-the-system-log.html
github.com/FriendsOfPHP/security-advisories/blob/master/contao/contao/CVE-2018-10125.yaml
github.com/FriendsOfPHP/security-advisories/blob/master/contao/core-bundle/CVE-2018-10125.yaml
github.com/FriendsOfPHP/security-advisories/blob/master/contao/core/CVE-2018-10125.yaml
nvd.nist.gov/vuln/detail/CVE-2018-10125