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https://issues.apache.org/jira/browse/VELTOOLS-169?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Osipov reopened VELTOOLS-169:
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> Upgrade commons-collections compile dependency to v3.2.2 or v4.1
> ----------------------------------------------------------------
>
> Key: VELTOOLS-169
> URL: https://issues.apache.org/jira/browse/VELTOOLS-169
> Project: Velocity Tools
> Issue Type: Bug
> Components: Build
> Affects Versions: 2.0
> Reporter: Mark Symons
> Assignee: Claude Brisson
> Priority: Critical
>
> Upgrade commons-collections to v3.2.2 or v4.1 or later to mitigate level 9
> threat.
> Old name: commons-collections:commons-collections
> Current name: org.apache.commons:commons-collections4
> Velocity Tools v2.0 uses commons-collections:commons-collections v3.2
> commons-collections4 v4.1 includes the critical security fix COLLECTIONS-580.
> Quoting from v4.1 release notes:
> {quote}
> Serialization support for unsafe classes in the functor package has been
> removed completely as this can be exploited for remote code execution
> attacks. Classes considered to be unsafe are:
> CloneTransformer
> ForClosure
> InstantiateFactory
> InstantiateTransformer
> InvokerTransformer
> PrototypeCloneFactory
> PrototypeSerializationFactory
> WhileClosure.
> {quote}
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