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https://issues.apache.org/jira/browse/VELOCITY-869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15245550#comment-15245550
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Sergiu Dumitriu commented on VELOCITY-869:
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Depends on how your build works. If you're using Maven, you can either add a 
{{<dependency>}} on commons-collections 3.2.2 (no need to exclude 3.2.1, Maven 
automatically selects just one version for a library), or add a 
[{{<dependencyManagement><dependencies><dependency>}}|https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#Dependency_Management]
 on 3.2.2, which will make Maven automatically upgrade the transitive 
dependency, without declaring a dependency that's not actually used by your 
code.

> Vulnerability in dependency: commons-collections:3.2.1
> ------------------------------------------------------
>
>                 Key: VELOCITY-869
>                 URL: https://issues.apache.org/jira/browse/VELOCITY-869
>             Project: Velocity
>          Issue Type: Bug
>          Components: Build
>    Affects Versions: 1.7
>            Reporter: Ryan Blue
>            Assignee: Sergiu Dumitriu
>             Fix For: 2.x, 1.x
>
>
> There is an arbitrary remote code execution bug in commons-collections, 
> tracked by COLLECTIONS-580. Updating to the version where this bug is fixed, 
> 3.2.2, will help downstream libraries (like avro-ipc) from pulling in the bad 
> version. Thanks!



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