{"action":"Upgrade com.thoughtworks.xstream:xstream to 1.4.16 or later.","affected":[{"fixed":"1.4.16","introduced":"0"}],"component":"com.thoughtworks.xstream:xstream","cve_ids":["CVE-2021-21347"],"ecosystem":"Maven","epss":0.14301,"exploited":false,"fixed_versions":["1.4.16"],"ghsa_id":"GHSA-qpfq-ph7r-qv6f","id":"tcs_01M5N99X45BE7PGMBYR21JQ3HT","modified_at":"2026-07-08T06:29:05.441232148Z","published_at":"2021-03-22T23:29:00Z","references":["https://osv.dev/vulnerability/GHSA-qpfq-ph7r-qv6f","https://github.com/x-stream/xstream/security/advisories/GHSA-qpfq-ph7r-qv6f","https://nvd.nist.gov/vuln/detail/CVE-2021-21347","https://github.com/x-stream/xstream","https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd@%3Cusers.activemq.apache.org%3E","https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0@%3Cdev.jmeter.apache.org%3E","https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB","https://security.netapp.com/advisory/ntap-20210430-0002","https://www.debian.org/security/2021/dsa-5004","https://www.oracle.com//security-alerts/cpujul2021.html","https://www.oracle.com/security-alerts/cpujan2022.html","https://www.oracle.com/security-alerts/cpuoct2021.html","https://x-stream.github.io/CVE-2021-21347.html","https://x-stream.github.io/security.html#workaround","http://x-stream.github.io/changes.html#1.4.16"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"GHSA-qpfq-ph7r-qv6f","url":"https://osv.dev/vulnerability/GHSA-qpfq-ph7r-qv6f"}],"summary":"XStream is vulnerable to an Arbitrary Code Execution attack"}