Java zero day needs to be patched log4j
I have an old serviio so don't know if the current one is patched for this but it was just discovered and apache are working on it but they make it sound very bad.
On my version of serviio it has
C:\Program Files\Serviio\lib\slf4j-log4j12.jar
C:\Program Files\Serviio\lib\log4j.jar
C:\Program Files\Serviio\config\log4j.xml
C:\Program Files\Serviio\legal\Log4J-licence.txt
You probably already know but this would be worth upgrading to a new version for me to be safe (relatively speaking).