CVE-2017-7525 Threat Level 9 Against Solr v7.6. org.codehaus.jackson : jackson-mapper-asl : 1.9.13. .A deserialization flaw was discovered in the jackson-databind, versions before 2.6.7.1, 2.7.9.1 and 2.8.9, ...

We can't move to Solr 7 without fixing this issue flagged by Sonatype scan Of Solr - 7.6.0 Build,
Using Scanner 1.56.0-01

Threat Level 9       org.codehaus.jackson : jackson-mapper-asl : 1.9.13.   

A deserialization flaw was discovered in the jackson-databind, versions before 2.6.7.1, 2.7.9.1 and 2.8.9, which could allow an unauthenticated user to perform code execution by sending the maliciously crafted input to the readValue method of the ObjectMapper.

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7525