CVE-2021-21343: Deserialization of Untrusted Data

March 23, 2021 (updated November 7, 2023)

XStream is a Java library to serialize objects to XML and back again. In XStream, there is a vulnerability where the processed stream at unmarshalling time contains type information to recreate the formerly written objects. XStream creates therefore new instances based on these type information.

References

nvd.nist.gov/vuln/detail/CVE-2021-21343

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