GHSA-hwpc-8xqv-jvj4 · Severity: medium · Ecosystem: maven — XStream is vulnerable to a Remote Command Execution attack
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 who has sufficient rights to execute commands of the 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.
Conclusion & alert: CVE-2021-21345 is rated High Exploit Risk (71.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 86.56%, 99th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-31 | 88.09% | 86.56% | -1.53% |
| 2 | 2026-03-24 | 86.96% | 88.09% | +1.13% |
| 3 | 2026-03-10 | — | 86.96% | — |
Full EPSS history (61 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.8 | 3.1 | MEDIUM |
|
1.3 | 4.0 | [email protected] |
| 9.9 | 3.1 | CRITICAL |
|
3.1 | 6.0 | [email protected] |
| 6.5 | 2.0 | MEDIUM |
|
8.0 | 6.4 | [email protected] |
GHSA-hwpc-8xqv-jvj4 · Severity: medium · Ecosystem: maven — XStream is vulnerable to a Remote Command Execution attack
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2021-21345 not yet assigned priority: Debian including 1 source packages (libxstream-java), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2021-21345 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2021-21345 |
suse
|
high | CVE-2021-21345 severity important: SUSE including 247 source package names (5.0.0-beta1.2.122:xstream-1.4.16-3.8.1, 5.1.0.6.40:xstream-1.4.16-3.8.1, …), 280 product×package rows across 32 product lines (Container suse/manager/5.0/x86_64/server, Container suse/multi-linux-manager/5.1/x86_64/server, … (32 product lines)): Known Affected 231, Fixed 49. | https://www.suse.com/security/cve/CVE-2021-21345/ |
ubuntu
|
medium | CVE-2021-21345 medium priority: Ubuntu including 1 source packages (libxstream-java), 14 status rows across 14 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, trusty, upstream, xenial): released 14. | https://ubuntu.com/security/CVE-2021-21345 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| netapp | oncommand_insight | — | cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* |
| apache | activemq | < 5.15.14 | cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:* |
| apache | activemq | 5.16.0 | cpe:2.3:a:apache:activemq:5.16.0:*:*:*:*:*:*:* |
| apache | activemq | 5.16.1 | cpe:2.3:a:apache:activemq:5.16.1:*:*:*:*:*:*:* |
| apache | jmeter | < 5.5 | cpe:2.3:a:apache:jmeter:*:*:*:*:*:*:*:* |
| xstream | xstream | < 1.4.16 | cpe:2.3:a:xstream:xstream:*:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| debian | debian_linux | 11.0 | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |
| fedoraproject | fedora | 33 | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* |
| fedoraproject | fedora | 34 | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
| fedoraproject | fedora | 35 | cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* |
| oracle | banking_enterprise_default_management | 2.10.0 | cpe:2.3:a:oracle:banking_enterprise_default_management:2.10.0:*:*:*:*:*:*:* |
| oracle | banking_enterprise_default_management | 2.12.0 | cpe:2.3:a:oracle:banking_enterprise_default_management:2.12.0:*:*:*:*:*:*:* |
| oracle | banking_platform | 2.4.0 | cpe:2.3:a:oracle:banking_platform:2.4.0:*:*:*:*:*:*:* |
| oracle | banking_platform | 2.7.1 | cpe:2.3:a:oracle:banking_platform:2.7.1:*:*:*:*:*:*:* |
| oracle | banking_platform | 2.9.0 | cpe:2.3:a:oracle:banking_platform:2.9.0:*:*:*:*:*:*:* |
| oracle | banking_platform | 2.12.0 | cpe:2.3:a:oracle:banking_platform:2.12.0:*:*:*:*:*:*:* |
| oracle | banking_virtual_account_management | 14.2.0 | cpe:2.3:a:oracle:banking_virtual_account_management:14.2.0:*:*:*:*:*:*:* |
| oracle | banking_virtual_account_management | 14.3.0 | cpe:2.3:a:oracle:banking_virtual_account_management:14.3.0:*:*:*:*:*:*:* |
| oracle | banking_virtual_account_management | 14.5.0 | cpe:2.3:a:oracle:banking_virtual_account_management:14.5.0:*:*:*:*:*:*:* |
| oracle | business_activity_monitoring | 11.1.1.9.0 | cpe:2.3:a:oracle:business_activity_monitoring:11.1.1.9.0:*:*:*:*:*:*:* |
| oracle | business_activity_monitoring | 12.2.1.3.0 | cpe:2.3:a:oracle:business_activity_monitoring:12.2.1.3.0:*:*:*:*:*:*:* |
| oracle | business_activity_monitoring | 12.2.1.4.0 | cpe:2.3:a:oracle:business_activity_monitoring:12.2.1.4.0:*:*:*:*:*:*:* |
| oracle | communications_billing_and_revenue_management_elastic_charging_engine | 12.0.0.3.0 | cpe:2.3:a:oracle:communications_billing_and_revenue_management_elastic_charging_engine:12.0.0.3.0:*:*:*:*:*:*:* |
| oracle | communications_policy_management | 12.5.0 | cpe:2.3:a:oracle:communications_policy_management:12.5.0:*:*:*:*:*:*:* |
| oracle | communications_unified_inventory_management | 7.3.2 | cpe:2.3:a:oracle:communications_unified_inventory_management:7.3.2:*:*:*:*:*:*:* |
| oracle | communications_unified_inventory_management | 7.3.4 | cpe:2.3:a:oracle:communications_unified_inventory_management:7.3.4:*:*:*:*:*:*:* |
| oracle | communications_unified_inventory_management | 7.3.5 | cpe:2.3:a:oracle:communications_unified_inventory_management:7.3.5:*:*:*:*:*:*:* |
| oracle | communications_unified_inventory_management | 7.4.0 | cpe:2.3:a:oracle:communications_unified_inventory_management:7.4.0:*:*:*:*:*:*:* |
| oracle | communications_unified_inventory_management | 7.4.1 | cpe:2.3:a:oracle:communications_unified_inventory_management:7.4.1:*:*:*:*:*:*:* |
| oracle | peoplesoft_enterprise_peopletools | 8.58 | cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:* |
| oracle | peoplesoft_enterprise_peopletools | 8.59 | cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59:*:*:*:*:*:*:* |
| oracle | retail_xstore_point_of_service | 16.0.6 | cpe:2.3:a:oracle:retail_xstore_point_of_service:16.0.6:*:*:*:*:*:*:* |
| oracle | retail_xstore_point_of_service | 17.0.4 | cpe:2.3:a:oracle:retail_xstore_point_of_service:17.0.4:*:*:*:*:*:*:* |
| oracle | retail_xstore_point_of_service | 18.0.3 | cpe:2.3:a:oracle:retail_xstore_point_of_service:18.0.3:*:*:*:*:*:*:* |
| oracle | retail_xstore_point_of_service | 19.0.2 | cpe:2.3:a:oracle:retail_xstore_point_of_service:19.0.2:*:*:*:*:*:*:* |
| oracle | webcenter_portal | 11.1.1.9.0 | cpe:2.3:a:oracle:webcenter_portal:11.1.1.9.0:*:*:*:*:*:*:* |
| oracle | webcenter_portal | 12.2.1.3.0 | cpe:2.3:a:oracle:webcenter_portal:12.2.1.3.0:*:*:*:*:*:*:* |
| oracle | webcenter_portal | 12.2.1.4.0 | cpe:2.3:a:oracle:webcenter_portal:12.2.1.4.0:*:*:*:*:*:*:* |