Please be advised that Security Advisory SA-2022-031 has been released.
Summary
Apache Commons Text performs variable interpolation, allowing properties to be dynamically evaluated and expanded. The standard format for interpolation is "${prefix:name}", where "prefix" is used to locate an instance of org.apache.commons.text.lookup.StringLookup that performs the interpolation. Starting with version 1.5 and continuing through 1.9, the set of default Lookup instances included interpolators that could result in arbitrary code execution or contact with remote servers.
Please see the full Security Advisory article here for more details: https://extremeportal.force.com/ExtrArticleDetail?an=000108101