A reflected cross-site scripting (XSS) vulnerability in qcubed (all versions including 3.1.1) in profile.php via the stQuery-parameter allows unauthenticated attackers to steal sessions of authenticated users.
https://www.ait.ac.at/themen/cyber-security/pentesting/security-advisories/ait-sa-20210215-03
https://tech.feedyourhead.at/content/QCubed-Cross-Site-Scripting-CVE-2020-24912
http://seclists.org/fulldisclosure/2021/Mar/30
http://packetstormsecurity.com/files/161763/QCubed-3.1.1-Cross-Site-Scripting.html