HortusFox before 6.2 contains a remote code execution vulnerability in ThemeModule::startImport() where an uploaded ZIP archive is extracted directly into the public web root before any validation of file names, extensions, or content is performed. An authenticated administrator can upload a crafted theme archive containing a PHP file and an .htaccess file to re-enable execution, then request it under the themes directory to execute arbitrary OS commands as the web-server user.

A cross-site scripting (XSS) vulnerability in the /controller/admin.php endpoint of hortusfox-web v4.4 allows attackers to execute arbitrary JavaScript in the context of a user's browser via a crafted payload injected into the email parameter.

A cross-site scripting (XSS) vulnerability in the /Calendar endpoint of hortusfox-web v4.4 allows attackers to execute arbitrary JavaScript in the context of a user's browser via a crafted payload injected into the add function.

A cross-site scripting (XSS) vulnerability in the /tasks endpoint of hortusfox-web v4.4 allows attackers to execute arbitrary JavaScript in the context of a user's browser via a crafted payload injected into the title parameter.