--- id: CVE-2021-21342 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 where the processed stream at unmarshalling time contains type information to recreate the formerly written … severity: medium cvss: 5.3 cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N' cwe: - CWE-502 - CWE-918 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_brm_-_elastic_charging_engine = 12.0.0.3 - 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 - 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: '2026-10-07T19:17:20.313' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-21342' 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-hvv8-336g-rx3m 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-2021-21342.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-hvv8-336g-rx3m 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-2021-21342.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 ssvc: exploitation: none automatable: 'yes' technicalImpact: partial timestamp: '2026-10-07T18:47:23.226452Z' epss: 0.4999 epssPercentile: 0.98873 ingestedAt: '2026-10-07T19:44:15.640Z' --- ## Overview XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, 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. An attacker can manipulate the processed input stream and replace or inject objects, that result in a server-side forgery request. 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. ## 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_brm_-_elastic_charging_engine = 12.0.0.3` - `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` - `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` ## Remediation Upgrade past the affected range: - `activemq 5.15.14` - `jmeter 5.5` - `xstream 1.4.16`