NamelessMC is a free, easy to use & powerful website software for Minecraft servers. Cross-site scripting (XSS) vulnerability in NamelessMC before 2.2.4 allows remote authenticated attackers to inject arbitrary web script or HTML via the default_keywords crafted parameter. This vulnerability is fixed in 2.2.4.
https://github.com/NamelessMC/Nameless/security/advisories/GHSA-f5rm-w4mx-q7rx
https://github.com/NamelessMC/Nameless/commit/56d35cff9ee944c061791ef478cabd2bed0223c4