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Description
The /users endpoint in Statamic Core before 2.11.8 allows XSS to add an administrator user. This can be exploited via CSRF. Stored XSS can occur via a JavaScript payload in a username during account registration. Reflected XSS can occur via the /users PATH_INFO.
References
gist.github.com/kernelsndrs/86b78e869d481566223914ec7d4fc881
web.archive.org/...20200304174034/www.statamic.com/changelog