{"id":"CVE-2021-21351","title":"XStream is a Java library to serialize objects to XML and back again","summary":"XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the p…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:N","cwe":["CWE-434","CWE-502"],"vendor":"netapp","product":"oncommand_insight","affected":["oncommand_insight","activemq < 5.15.14","activemq = 5.16.0","activemq = 5.16.1","jmeter < 5.5","xstream < 1.4.16","debian_linux = 9.0","debian_linux = 10.0","debian_linux = 11.0","fedora = 33","fedora = 34","fedora = 35","banking_enterprise_default_management = 2.10.0","banking_enterprise_default_management = 2.12.0","banking_platform = 2.4.0","banking_platform = 2.7.1","banking_platform = 2.9.0","banking_platform = 2.12.0","banking_virtual_account_management = 14.2.0","banking_virtual_account_management = 14.3.0","banking_virtual_account_management = 14.5.0","business_activity_monitoring = 11.1.1.9.0","business_activity_monitoring = 12.2.1.3.0","business_activity_monitoring = 12.2.1.4.0","communications_billing_and_revenue_management_elastic_charging_engine = 12.0.0.3.0","communications_policy_management = 12.5.0","communications_unified_inventory_management = 7.3.2","communications_unified_inventory_management = 7.3.4","communications_unified_inventory_management = 7.3.5","communications_unified_inventory_management = 7.4.0","communications_unified_inventory_management = 7.4.1","mysql_server <= 8.0.27","retail_xstore_point_of_service = 16.0.6","retail_xstore_point_of_service = 17.0.4","retail_xstore_point_of_service = 18.0.3","retail_xstore_point_of_service = 19.0.2","webcenter_portal = 11.1.1.9.0","webcenter_portal = 12.2.1.3.0","webcenter_portal = 12.2.1.4.0"],"patched":["activemq 5.15.14","jmeter 5.5","xstream 1.4.16"],"published":"2021-03-23","updated":"2026-10-07","sourceUpdated":"2026-10-07T19:17:25.207","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-21351","references":[{"url":"http://x-stream.github.io/changes.html#1.4.16","label":"security-advisories@github.com"},{"url":"https://github.com/x-stream/xstream/security/advisories/GHSA-hrcp-8f3q-4w2c","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd%40%3Cusers.activemq.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0%40%3Cdev.jmeter.apache.org%3E","label":"security-advisories@github.com"},{"url":"https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html","label":"security-advisories@github.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/","label":"security-advisories@github.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/","label":"security-advisories@github.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/","label":"security-advisories@github.com"},{"url":"https://security.netapp.com/advisory/ntap-20210430-0002/","label":"security-advisories@github.com"},{"url":"https://www.debian.org/security/2021/dsa-5004","label":"security-advisories@github.com"},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","label":"security-advisories@github.com"},{"url":"https://www.oracle.com/security-alerts/cpujan2022.html","label":"security-advisories@github.com"},{"url":"https://www.oracle.com/security-alerts/cpuoct2021.html","label":"security-advisories@github.com"},{"url":"https://x-stream.github.io/CVE-2021-21351.html","label":"security-advisories@github.com"},{"url":"https://x-stream.github.io/security.html#workaround","label":"security-advisories@github.com"},{"url":"http://x-stream.github.io/changes.html#1.4.16","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/x-stream/xstream/security/advisories/GHSA-hrcp-8f3q-4w2c","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd%40%3Cusers.activemq.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0%40%3Cdev.jmeter.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20210430-0002/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2021/dsa-5004","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpujan2022.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpuoct2021.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://x-stream.github.io/CVE-2021-21351.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://x-stream.github.io/security.html#workaround","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org","exploit-available"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-07T18:48:24.442394Z"},"epss":0.82136,"epssPercentile":0.99648,"exploits":{"nuclei":["CVE-2021-21351"],"checkedAt":"2026-10-07T19:44:51.111Z"},"exploitAvailable":true,"ingestedAt":"2026-10-07T19:44:15.643Z","slug":"CVE-2021-21351","body":"## Overview\n\nXStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability 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.\n\n## Affected\n\n- `oncommand_insight`\n- `activemq < 5.15.14`\n- `activemq = 5.16.0`\n- `activemq = 5.16.1`\n- `jmeter < 5.5`\n- `xstream < 1.4.16`\n- `debian_linux = 9.0`\n- `debian_linux = 10.0`\n- `debian_linux = 11.0`\n- `fedora = 33`\n- `fedora = 34`\n- `fedora = 35`\n- `banking_enterprise_default_management = 2.10.0`\n- `banking_enterprise_default_management = 2.12.0`\n- `banking_platform = 2.4.0`\n- `banking_platform = 2.7.1`\n- `banking_platform = 2.9.0`\n- `banking_platform = 2.12.0`\n- `banking_virtual_account_management = 14.2.0`\n- `banking_virtual_account_management = 14.3.0`\n- `banking_virtual_account_management = 14.5.0`\n- `business_activity_monitoring = 11.1.1.9.0`\n- `business_activity_monitoring = 12.2.1.3.0`\n- `business_activity_monitoring = 12.2.1.4.0`\n- `communications_billing_and_revenue_management_elastic_charging_engine = 12.0.0.3.0`\n- `communications_policy_management = 12.5.0`\n- `communications_unified_inventory_management = 7.3.2`\n- `communications_unified_inventory_management = 7.3.4`\n- `communications_unified_inventory_management = 7.3.5`\n- `communications_unified_inventory_management = 7.4.0`\n- `communications_unified_inventory_management = 7.4.1`\n- `mysql_server <= 8.0.27`\n- `retail_xstore_point_of_service = 16.0.6`\n- `retail_xstore_point_of_service = 17.0.4`\n- `retail_xstore_point_of_service = 18.0.3`\n- `retail_xstore_point_of_service = 19.0.2`\n- `webcenter_portal = 11.1.1.9.0`\n- `webcenter_portal = 12.2.1.3.0`\n- `webcenter_portal = 12.2.1.4.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `activemq 5.15.14`\n- `jmeter 5.5`\n- `xstream 1.4.16`","depth":"twilight","depthScore":58,"depthScoreParts":{"impact":29.7,"likelihood":16.4,"exploitation":12,"ransomware":0},"changes":[]}