Solr handlers: Restrict 'wt' param to 'json' and 'xml' by default.
Solr handlers: Restrict 'wt' param to 'json' and 'xml' by default.

Solr supports multiple response writers. Since at least via the
'javabin' writer eval code can be executed, we restrict the allowed
writers by default. The configuration can be adjusted via a
comma-separated list of allowed 'wt' values, provided via the parameter
"allowedWriteTo" in the request handler configuration of the Solr
handler in the opencms-system.xml.
alkacon/opencms-core,gallardo/opencms-core,alkacon/opencms-core,gallardo/opencms-core,gallardo/opencms-core,gallardo/opencms-core,alkacon/opencms-core,alkacon/opencms-core