Privilege escalation via properties with wiki syntax that are executed with the wrong author

It's possible to use the right of an existing document content author to execute a text area property.

To reproduce:

As an admin with programming rights, create a new user without script or programming right.
Login with the freshly created user.
Insert the following text in source mode in the about section:

    {{groovy}}println("hello from groovy!"){{/groovy}}

This has been patched in XWiki 14.10, 14.4.7, and 13.10.11.

No known workaround.

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