Hello Ivo,
the last few days I had some Security Issues during a routine scan of my hosting partner.
All the sites are up to date (J6.1.1) and run on Gantry with one of your Templates. Are there any known security vulnerabilities in your extensions? Or is there a known vulnerability in the Joomla project itself?
Apart from this setup, the only other thing the affected sites have in common is the GDPR component from JExtensionstore.
I need to identify the vulnerability immediately to prevent further damage.