Grav is a file-based Web platform. Prior to 2.0.0-beta.2, a stored Cross-Site Scripting (XSS) vulnerability in getgrav/grav allows publisher-level accounts to execute arbitrary JavaScript. The issue arises from a blacklist bypass in the detectXss() function when handling unquoted HTML event attributes. This vulnerability is fixed in 2.0.0-beta.2.
https://github.com/getgrav/grav/security/advisories/GHSA-9695-8fr9-hw5q
https://github.com/getgrav/grav/commit/5a12f9be8314682c8713e569e330f11805d0a663