CVE-2021-45105 and using ctx for router appender

[Leon Finker]

Hi,

Could someone please confirm if using ctx in the Routing appender is
not affected by the latest CVE-2021-45105?

Example,
<Routing name="Routing">
     <Routes pattern="$${ctx:ROUTINGKEY}">

I wouldn't think so. Just want to double check.

Thank you very much!