The remote Debian host is missing a security-related update.
Two vulnerabilities have been found in Solr, a search server based on Lucene, which could result in the execution of arbitrary code or path traversal.
Upgrade the lucene-solr packages. For the oldstable distribution (jessie), these problems have been fixed in version 3.6.2+dfsg-5+deb8u1. For the stable distribution (stretch), these problems have been fixed in version 3.6.2+dfsg-10+deb9u1.