CVE-2020-5421 | RFD Protection Bypass via jsessionid

In Spring Framework versions 5.2.0 - 5.2.8, 5.1.0 - 5.1.17, 5.0.0 - 5.0.18, 4.3.0 - 4.3.28, and older unsupported versions, the protections against RFD attacks from CVE-2015-5211 may be bypassed depending on the browser used through the use of a jsessionid path parameter.

Published: 2020-09-19 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-5421 is rated Moderate Risk (54.3/100): CVSS Medium severity, with high exploitation likelihood (EPSS 10.74%, 95th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-5421

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 2026-06-15 63.83% 10.74% -53.09%
2 2026-03-22 68.07% 63.83% -4.25%
3 2026-03-18 — 68.07% —

Full EPSS history (44 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-5421

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 1.3 4.7 [email protected]
8.7 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.3 5.8 [email protected]
3.6 2.0 LOW
AV:N/AC:H/Au:S/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 3.9 4.9 [email protected]

Weakness enumeration for CVE-2020-5421

GitHub Security Advisory for CVE-2020-5421

GHSA-rv39-3qh7-9v7w · Severity: medium · Ecosystem: maven — Improper Input Validation in Spring Framework

OS Trackers for CVE-2020-5421

vendor priority summary link
debian unimportant CVE-2020-5421 unimportant priority: Debian including 1 source packages (libspring-java), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-5421
redhat medium — https://access.redhat.com/security/cve/CVE-2020-5421
ubuntu medium CVE-2020-5421 medium priority: Ubuntu including 1 source packages (libspring-java), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 8, needs-triage 8. https://ubuntu.com/security/CVE-2020-5421

Affected software / configurations for CVE-2020-5421

Vendor Product Version Raw CPE
vmware spring_framework < 4.3.29 cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*
vmware spring_framework >= 5.0.0, < 5.0.19 cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*
vmware spring_framework >= 5.1.0, < 5.1.18 cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*
vmware spring_framework >= 5.2.0, < 5.2.9 cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*
oracle commerce_guided_search 11.3.2 cpe:2.3:a:oracle:commerce_guided_search:11.3.2:*:*:*:*:*:*:*
oracle communications_brm 11.3.0.9 cpe:2.3:a:oracle:communications_brm:11.3.0.9:*:*:*:*:*:*:*
oracle communications_brm 12.0.0.3 cpe:2.3:a:oracle:communications_brm:12.0.0.3:*:*:*:*:*:*:*
oracle communications_design_studio 7.3.4 cpe:2.3:a:oracle:communications_design_studio:7.3.4:*:*:*:*:*:*:*
oracle communications_design_studio 7.3.5 cpe:2.3:a:oracle:communications_design_studio:7.3.5:*:*:*:*:*:*:*
oracle communications_design_studio 7.4.0 cpe:2.3:a:oracle:communications_design_studio:7.4.0:*:*:*:*:*:*:*
oracle communications_session_report_manager >= 8.2.1, <= 8.2.2.1 cpe:2.3:a:oracle:communications_session_report_manager:*:*:*:*:*:*:*:*
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 endeca_information_discovery_integrator 3.2.0 cpe:2.3:a:oracle:endeca_information_discovery_integrator:3.2.0:*:*:*:*:*:*:*
oracle enterprise_data_quality 12.2.1.3.0 cpe:2.3:a:oracle:enterprise_data_quality:12.2.1.3.0:*:*:*:*:*:*:*
oracle enterprise_data_quality 12.2.1.4.0 cpe:2.3:a:oracle:enterprise_data_quality:12.2.1.4.0:*:*:*:*:*:*:*
oracle financial_services_analytical_applications_infrastructure >= 8.0.6, <= 8.1.0 cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:*:*:*:*:*:*:*:*
oracle flexcube_private_banking 12.0.0 cpe:2.3:a:oracle:flexcube_private_banking:12.0.0:*:*:*:*:*:*:*
oracle flexcube_private_banking 12.1.0 cpe:2.3:a:oracle:flexcube_private_banking:12.1.0:*:*:*:*:*:*:*
oracle fusion_middleware 12.2.1.3.0 cpe:2.3:a:oracle:fusion_middleware:12.2.1.3.0:*:*:*:*:*:*:*
oracle fusion_middleware 12.2.1.4.0 cpe:2.3:a:oracle:fusion_middleware:12.2.1.4.0:*:*:*:*:*:*:*
oracle goldengate_application_adapters 19.1.0.0.0 cpe:2.3:a:oracle:goldengate_application_adapters:19.1.0.0.0:*:*:*:*:*:*:*
oracle healthcare_master_person_index 4.0.2.5 cpe:2.3:a:oracle:healthcare_master_person_index:4.0.2.5:*:*:*:*:*:*:*
oracle hyperion_infrastructure_technology 11.1.2.4 cpe:2.3:a:oracle:hyperion_infrastructure_technology:11.1.2.4:*:*:*:*:*:*:*
oracle insurance_policy_administration >= 11.1.0, <= 11.3.0 cpe:2.3:a:oracle:insurance_policy_administration:*:*:*:*:*:*:*:*
oracle insurance_policy_administration 10.2 cpe:2.3:a:oracle:insurance_policy_administration:10.2:*:*:*:*:*:*:*
oracle insurance_policy_administration 10.2.4 cpe:2.3:a:oracle:insurance_policy_administration:10.2.4:*:*:*:*:*:*:*
oracle insurance_policy_administration 11.0.2 cpe:2.3:a:oracle:insurance_policy_administration:11.0.2:*:*:*:*:*:*:*
oracle insurance_rules_palette >= 11.1.0, <= 11.3.0 cpe:2.3:a:oracle:insurance_rules_palette:*:*:*:*:*:*:*:*
oracle insurance_rules_palette 10.2.0 cpe:2.3:a:oracle:insurance_rules_palette:10.2.0:*:*:*:*:*:*:*
oracle insurance_rules_palette 10.2.4 cpe:2.3:a:oracle:insurance_rules_palette:10.2.4:*:*:*:*:*:*:*
oracle insurance_rules_palette 11.0.2 cpe:2.3:a:oracle:insurance_rules_palette:11.0.2:*:*:*:*:*:*:*
oracle mysql_enterprise_monitor <= 8.0.22 cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:*
oracle mysql_enterprise_monitor 8.0.23 cpe:2.3:a:oracle:mysql_enterprise_monitor:8.0.23:*:*:*:*:*:*:*
oracle primavera_gateway >= 16.2.0, <= 16.2.11 cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:*
oracle primavera_gateway >= 17.12.0, <= 17.12.9 cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:*
oracle primavera_gateway >= 18.8.0, <= 18.8.10 cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:*
oracle primavera_gateway >= 19.12.0, <= 19.12.10 cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:*
oracle primavera_p6_enterprise_project_portfolio_management >= 16.1.0, <= 16.2.20 cpe:2.3:a:oracle:primavera_p6_enterprise_project_portfolio_management:*:*:*:*:*:*:*:*
oracle primavera_p6_enterprise_project_portfolio_management >= 17.1.0, <= 17.12.19 cpe:2.3:a:oracle:primavera_p6_enterprise_project_portfolio_management:*:*:*:*:*:*:*:*
oracle primavera_p6_enterprise_project_portfolio_management >= 18.1.0, <= 18.8.21 cpe:2.3:a:oracle:primavera_p6_enterprise_project_portfolio_management:*:*:*:*:*:*:*:*
oracle primavera_p6_enterprise_project_portfolio_management >= 19.12.0, <= 19.12.10 cpe:2.3:a:oracle:primavera_p6_enterprise_project_portfolio_management:*:*:*:*:*:*:*:*
oracle retail_assortment_planning 16.0.3.0 cpe:2.3:a:oracle:retail_assortment_planning:16.0.3.0:*:*:*:*:*:*:*
oracle retail_bulk_data_integration 16.0.3.0 cpe:2.3:a:oracle:retail_bulk_data_integration:16.0.3.0:*:*:*:*:*:*:*
oracle retail_customer_engagement >= 16.0, <= 19.0 cpe:2.3:a:oracle:retail_customer_engagement:*:*:*:*:*:*:*:*
oracle retail_customer_management_and_segmentation_foundation >= 16.0, <= 19.0 cpe:2.3:a:oracle:retail_customer_management_and_segmentation_foundation:*:*:*:*:*:*:*:*
oracle retail_financial_integration 14.1.3 cpe:2.3:a:oracle:retail_financial_integration:14.1.3:*:*:*:*:*:*:*
oracle retail_financial_integration 15.0.3 cpe:2.3:a:oracle:retail_financial_integration:15.0.3:*:*:*:*:*:*:*
oracle retail_financial_integration 16.0.3 cpe:2.3:a:oracle:retail_financial_integration:16.0.3:*:*:*:*:*:*:*
oracle retail_integration_bus 14.1.3 cpe:2.3:a:oracle:retail_integration_bus:14.1.3:*:*:*:*:*:*:*
oracle retail_integration_bus 15.0.3 cpe:2.3:a:oracle:retail_integration_bus:15.0.3:*:*:*:*:*:*:*
oracle retail_integration_bus 16.0.3 cpe:2.3:a:oracle:retail_integration_bus:16.0.3:*:*:*:*:*:*:*
oracle retail_invoice_matching 14.0 cpe:2.3:a:oracle:retail_invoice_matching:14.0:*:*:*:*:*:*:*
oracle retail_invoice_matching 14.1 cpe:2.3:a:oracle:retail_invoice_matching:14.1:*:*:*:*:*:*:*
oracle retail_merchandising_system 16.0.3 cpe:2.3:a:oracle:retail_merchandising_system:16.0.3:*:*:*:*:*:*:*
oracle retail_order_broker 15.0 cpe:2.3:a:oracle:retail_order_broker:15.0:*:*:*:*:*:*:*
oracle retail_order_broker 16.0 cpe:2.3:a:oracle:retail_order_broker:16.0:*:*:*:*:*:*:*
oracle retail_predictive_application_server 14.1 cpe:2.3:a:oracle:retail_predictive_application_server:14.1:*:*:*:*:*:*:*
oracle retail_returns_management 14.1 cpe:2.3:a:oracle:retail_returns_management:14.1:*:*:*:*:*:*:*
oracle retail_service_backbone 14.1.3 cpe:2.3:a:oracle:retail_service_backbone:14.1.3:*:*:*:*:*:*:*
oracle retail_service_backbone 15.0.3 cpe:2.3:a:oracle:retail_service_backbone:15.0.3:*:*:*:*:*:*:*
oracle retail_service_backbone 16.0.3 cpe:2.3:a:oracle:retail_service_backbone:16.0.3:*:*:*:*:*:*:*
oracle retail_xstore_point_of_service 15.0.4 cpe:2.3:a:oracle:retail_xstore_point_of_service:15.0.4:*:*:*:*:*:*:*
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 storagetek_acsls 8.5.1 cpe:2.3:a:oracle:storagetek_acsls:8.5.1:*:*:*:*:*:*:*
oracle storagetek_tape_analytics_sw_tool 2.3 cpe:2.3:a:oracle:storagetek_tape_analytics_sw_tool:2.3:*:*:*:*:*:*:*
oracle weblogic_server 10.3.6.0.0 cpe:2.3:a:oracle:weblogic_server:10.3.6.0.0:*:*:*:*:*:*:*
oracle weblogic_server 12.1.3.0.0 cpe:2.3:a:oracle:weblogic_server:12.1.3.0.0:*:*:*:*:*:*:*
oracle weblogic_server 12.2.1.3.0 cpe:2.3:a:oracle:weblogic_server:12.2.1.3.0:*:*:*:*:*:*:*
oracle weblogic_server 12.2.1.4.0 cpe:2.3:a:oracle:weblogic_server:12.2.1.4.0:*:*:*:*:*:*:*
oracle weblogic_server 14.1.1.0.0 cpe:2.3:a:oracle:weblogic_server:14.1.1.0.0:*:*:*:*:*:*:*
netapp oncommand_insight — cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
netapp snap_creator_framework — cpe:2.3:a:netapp:snap_creator_framework:-:*:*:*:*:*:*:*
netapp snapcenter — cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*

References for CVE-2020-5421

URL Tags
https://lists.apache.org/thread.html/r1c679c43fa4f7846d748a937955c7921436d1b315445978254442163%40%3Ccommits.ambari.apache.org%3E
https://lists.apache.org/thread.html/r1eccdbd7986618a7319ee7a533bd9d9bf6e8678e59dd4cca9b5b2d7a%40%3Cissues.ambari.apache.org%3E
https://lists.apache.org/thread.html/r3589ed0d18edeb79028615080d5a0e8878856436bb91774a3196d9eb%40%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/r503e64b43a57fd68229cac4a869d1a9a2eac9e75f8719cad3a840211%40%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/r5c95eff679dfc642e9e4ab5ac6d202248a59cb1e9457cfbe8b729ac5%40%3Cissues.ambari.apache.org%3E
https://lists.apache.org/thread.html/r7e6a213eea7f04fc6d9e3bd6eb8d68c4df92a22e956e95cb2c482865%40%3Cissues.hive.apache.org%3E
https://lists.apache.org/thread.html/r8b496b1743d128e6861ee0ed3c3c48cc56c505b38f84fa5baf7ae33a%40%3Cdev.ambari.apache.org%3E
https://lists.apache.org/thread.html/r918caad55dcc640a16753b00d8d6acb90b4e36de4b6156d0867246ec%40%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/r9f13cccb214495e14648d2c9b8f2c6072fd5219e74502dd35ede81e1%40%3Cdev.ambari.apache.org%3E
https://lists.apache.org/thread.html/ra889d95141059c6cbe77dd80249bb488ae53b274b5f3abad09d9511d%40%3Cuser.ignite.apache.org%3E
https://lists.apache.org/thread.html/raf7ca57033e537e4f9d7df7f192fa6968c1e49409b2348e08d807ccb%40%3Cuser.ignite.apache.org%3E
https://lists.apache.org/thread.html/rb18ed999153ef0f0cb7af03efe0046c42c7242fd77fbd884a75ecfdc%40%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/rc9efaf6db98bee19db1bc911d0fa442287dac5cb229d4aaa08b6a13d%40%3Cissues.hive.apache.org%3E
https://lists.apache.org/thread.html/rd462a8b0dfab4c15e67c0672cd3c211ecd0e4f018f824082ed54f665%40%3Cissues.hive.apache.org%3E
https://lists.apache.org/thread.html/re014a49d77f038ba70e5e9934d400af6653e8c9ac110d32b1254127e%40%3Cdev.ranger.apache.org%3E
https://lists.apache.org/thread.html/rf00d8f4101a1c1ea4de6ea1e09ddf7472cfd306745c90d6da87ae074%40%3Cdev.hive.apache.org%3E
https://security.netapp.com/advisory/ntap-20210513-0009/ Third Party Advisory
https://tanzu.vmware.com/security/cve-2020-5421 Vendor Advisory
https://www.oracle.com//security-alerts/cpujul2021.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html Not Applicable Third Party Advisory
cvelogic Threat Intelligence