XSS exists in PRTG Network Monitor 20.1.56.1574 via crafted map properties. An attacker with Read/Write privileges can create a map, and then use the Map Designer Properties screen to insert JavaScript code. This can be exploited against any user with View Maps or Edit Maps access.
packetstormsecurity.com/files/160312/PRTG-Network-Monitor-20.4.63.1412-Cross-Site-Scripting.html
gist.github.com/alert3/e058baa33c31695f4168a1dbf77103df
kb.paessler.com/en/topic/88223-what-s-the-open-vulnerability-report-cve-2020-14073-that-my-security-tracker-informed-me-about
www.paessler.com/prtg/history/stable