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https://issues.apache.org/jira/browse/SOLR-7106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14321557#comment-14321557
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Erik Hatcher commented on SOLR-7106:
------------------------------------

bq. Can you explain in what sense it's a security vulnerability? 

Bad guy could upload a JAR with a request handler that ships back /etc/passwd 
or does other malicious things.

> Disable dynamic loading by default
> ----------------------------------
>
>                 Key: SOLR-7106
>                 URL: https://issues.apache.org/jira/browse/SOLR-7106
>             Project: Solr
>          Issue Type: Task
>            Reporter: Noble Paul
>            Assignee: Noble Paul
>            Priority: Blocker
>             Fix For: 5.0
>
>         Attachments: SOLR-7106.patch, SOLR-7106.patch
>
>
> Dynamic loading of jars is enabled by default SOLR-6801. It is a security 
> vulnerability and we should set it to be disabled by default



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