{"id":"CVE-2021-21344","revision":"a80e720b22f4402d99192a9387f52d33","records":[{"revision":"a80e720b22f4402d99192a9387f52d33","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2021-21344","aliases":[],"title":"XStream is vulnerable to an Arbitrary Code Execution attack","description":"XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.","state":0,"publishedAt":"2021-03-22T23:40:29+00:00","modifiedAt":"2026-10-07T18:48:03.533+00:00","affected":[{"ecosystem":"Vendor product","name":"xstream","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"xstream\",\n                    \"vendor\": \"x-stream\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"< 1.4.16\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","score":5.3,"severity":"MEDIUM"}],"references":["https://x-stream.github.io/security.html#workaround","http://x-stream.github.io/changes.html#1.4.16","https://github.com/x-stream/xstream/security/advisories/GHSA-59jw-jqf4-3wq3","https://x-stream.github.io/CVE-2021-21344.html","https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html","https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0%40%3Cdev.jmeter.apache.org%3E","https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd%40%3Cusers.activemq.apache.org%3E","https://security.netapp.com/advisory/ntap-20210430-0002/","https://www.oracle.com//security-alerts/cpujul2021.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/","https://www.oracle.com/security-alerts/cpuoct2021.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/","https://www.debian.org/security/2021/dsa-5004","https://www.oracle.com/security-alerts/cpujan2022.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2021-21344","license":"CVE Program Terms of Use","key":"cve-program:CVE-2021-21344","identifiers":["CVE-2021-21344"]},"retained":false,"historicalAffected":[]}],"coverage":[]}