Vulnerability Database

328,409

Total vulnerabilities in the database

CVE-2021-45105

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.

CVSS v3:

  • Severity: Medium
  • Score: 5.9
  • AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: Low
  • Score: 4.3
  • AV:N/AC:M/Au:N/C:N/I:N/A:P
Software From Fixed in
apache / log4j 2.0 2.3.1
apache / log4j 2.4 2.12.3
apache / log4j 2.13.0 2.16.0.x
debian / debian_linux 10.0 10.0.x
debian / debian_linux 11.0 11.0.x
sonicwall / network_security_manager 2.0 3.0
sonicwall / email_security - 10.0.12.x
sonicwall / web_application_firewall 3.0.0 3.1.0
sonicwall / 6bk1602-0aa12-0tp0_firmware - 2.7.0
sonicwall / 6bk1602-0aa22-0tp0_firmware - 2.7.0
sonicwall / 6bk1602-0aa32-0tp0_firmware - 2.7.0
sonicwall / 6bk1602-0aa42-0tp0_firmware - 2.7.0
sonicwall / 6bk1602-0aa52-0tp0_firmware - 2.7.0
oracle / e-business_suite 12.2 12.2.x
oracle / retail_back_office 14.1 14.1.x
oracle / weblogic_server 12.2.1.3.0 12.2.1.3.0.x
oracle / webcenter_portal 12.2.1.3.0 12.2.1.3.0.x
oracle / webcenter_sites 12.2.1.3.0 12.2.1.3.0.x
oracle / managed_file_transfer 12.2.1.3.0 12.2.1.3.0.x
oracle / retail_order_broker 16.0 16.0.x
oracle / retail_integration_bus 14.1.3 14.1.3.x
oracle / retail_returns_management 14.1 14.1.x
oracle / retail_central_office 14.1 14.1.x
oracle / banking_platform 2.6.2 2.6.2.x
oracle / primavera_unifier 18.8 18.8.x
oracle / identity_management_suite 12.2.1.3.0 12.2.1.3.0.x
oracle / retail_point-of-service 14.1 14.1.x
oracle / data_integrator 12.2.1.3.0 12.2.1.3.0.x
oracle / utilities_framework 4.4.0.0.0 4.4.0.0.0.x
oracle / instantis_enterprisetrack 17.1 17.1.x
oracle / instantis_enterprisetrack 17.2 17.2.x
oracle / instantis_enterprisetrack 17.3 17.3.x
oracle / agile_plm 9.3.6 9.3.6.x
oracle / communications_unified_inventory_management 7.3.5 7.3.5.x
oracle / weblogic_server 12.2.1.4.0 12.2.1.4.0.x
oracle / flexcube_universal_banking 14.0.0 14.3.0.x
oracle / business_intelligence 5.5.0.0.0 5.5.0.0.0.x
oracle / peoplesoft_enterprise_peopletools 8.58 8.58.x
oracle / primavera_unifier 19.12 19.12.x
oracle / webcenter_sites 12.2.1.4.0 12.2.1.4.0.x
oracle / webcenter_portal 12.2.1.4.0 12.2.1.4.0.x
oracle / weblogic_server 14.1.1.0.0 14.1.1.0.0.x
oracle / enterprise_manager_base_platform 13.4.0.0 13.4.0.0.x
oracle / communications_ip_service_activator 7.4.0 7.4.0.x
oracle / utilities_framework 4.3.0.1.0 4.3.0.6.0.x
oracle / utilities_framework 4.4.0.2.0 4.4.0.2.0.x
oracle / insurance_insbridge_rating_and_underwriting 5.6.1.0 5.6.1.0.x
oracle / enterprise_manager_ops_center 12.4.0.0 12.4.0.0.x
oracle / jdeveloper 12.2.1.4.0 12.2.1.4.0.x
oracle / enterprise_manager_for_peoplesoft 13.4.1.1 13.4.1.1.x
oracle / communications_services_gatekeeper 7.0 7.0.x
oracle / retail_merchandising_system 16.0.3 16.0.3.x
oracle / banking_platform 2.7.1 2.7.1.x
oracle / communications_evolved_communications_application_server 7.1 7.1.x
oracle / agile_engineering_data_management 6.2.1.0 6.2.1.0.x
oracle / data_integrator 12.2.1.4.0 12.2.1.4.0.x
oracle / retail_service_backbone 14.1.3 14.1.3.x
oracle / primavera_unifier 20.12 20.12.x
oracle / managed_file_transfer 12.2.1.4.0 12.2.1.4.0.x
oracle / communications_network_integrity 7.3.6 7.3.6.x
oracle / retail_order_broker 18.0 18.0.x
oracle / communications_interactive_session_recorder 6.3 6.3.x
oracle / communications_interactive_session_recorder 6.4 6.4.x
oracle / peoplesoft_enterprise_peopletools 8.59 8.59.x
oracle / communications_unified_inventory_management 7.4.1 7.4.1.x
oracle / retail_service_backbone 15.0.3.1 15.0.3.1.x
oracle / retail_service_backbone 14.1.3.2 14.1.3.2.x
oracle / primavera_gateway 17.12.0 17.12.11.x
oracle / utilities_framework 4.4.0.3.0 4.4.0.3.0.x
oracle / communications_performance_intelligence_center 10.4.0.3 10.4.0.3.x
oracle / retail_price_management 14.1.3.0 14.1.3.0.x
oracle / retail_price_management 15.0.3.0 15.0.3.0.x
oracle / retail_price_management 16.0.3.0 16.0.3.0.x
oracle / retail_order_broker 19.1 19.1.x
oracle / enterprise_manager_base_platform 13.5.0.0 13.5.0.0.x
oracle / primavera_gateway 20.12.0 20.12.7.x
oracle / banking_platform 2.12.0 2.12.0.x
oracle / autovue_for_agile_product_lifecycle_management 21.0.2 21.0.2.x
oracle / communications_cloud_native_core_security_edge_protection_proxy 1.7.0 1.7.0.x
oracle / banking_enterprise_default_management 2.12.0 2.12.0.x
oracle / banking_party_management 2.7.0 2.7.0.x
oracle / communications_messaging_server 8.1 8.1.x
oracle / retail_service_backbone 19.0.1.0 19.0.1.0.x
oracle / retail_merchandising_system 19.0.1 19.0.1.x
oracle / retail_integration_bus 14.1.3.2 14.1.3.2.x
oracle / retail_financial_integration 14.1.3.2 14.1.3.2.x
oracle / retail_eftlink 16.0.3 16.0.3.x
oracle / retail_eftlink 17.0.2 17.0.2.x
oracle / retail_eftlink 18.0.1 18.0.1.x
oracle / retail_eftlink 19.0.1 19.0.1.x
oracle / communications_eagle_ftp_table_base_retrieval 4.5 4.5.x
oracle / retail_integration_bus 15.0.3.1 15.0.3.1.x
oracle / retail_financial_integration 15.0.3.1 15.0.3.1.x
oracle / communications_asap 7.3 7.3.x
oracle / financial_services_model_management_and_governance 8.1.0.0.0 8.1.0.0.0.x
oracle / financial_services_model_management_and_governance 8.0.8.0.0 8.0.8.0.0.x
oracle / financial_services_analytical_applications_infrastructure 8.0.7 8.1.1.x
oracle / communications_convergence 3.0.2.2.0 3.0.2.2.0.x
oracle / primavera_unifier 21.12 21.12.x
oracle / siebel_ui_framework - 21.12.x
oracle / retail_service_backbone 19.0.0 19.0.0.x
oracle / retail_service_backbone 16.0.1 16.0.3.x
oracle / retail_price_management 13.2 13.2.x
oracle / retail_price_management 14.0.4 14.0.4.x
oracle / retail_predictive_application_server 14.1.3.46 14.1.3.46.x
oracle / retail_predictive_application_server 15.0.3.115 15.0.3.115.x
oracle / retail_predictive_application_server 16.0.3.240 16.0.3.240.x
oracle / retail_order_management_system 19.5 19.5.x
oracle / retail_invoice_matching 15.0.3 15.0.3.x
oracle / retail_invoice_matching 16.0.3 16.0.3.x
oracle / retail_integration_bus 16.0.1 16.0.3.x
oracle / retail_integration_bus 19.0.0 19.0.1.0.x
oracle / retail_eftlink 20.0.1 20.0.1.x
oracle / financial_services_model_management_and_governance 8.1.1.0.0 8.1.1.0.0.x
oracle / primavera_p6_enterprise_project_portfolio_management 21.12.0.0 21.12.0.0.x
oracle / primavera_p6_enterprise_project_portfolio_management 20.12.0.0 20.12.12.0.x
oracle / primavera_p6_enterprise_project_portfolio_management 19.12.0.0 19.12.18.0.x
oracle / primavera_gateway 21.12.0 21.12.0.x
oracle / primavera_gateway 19.12.0 19.12.12.x
oracle / primavera_gateway 18.8.0 18.8.13.x
oracle / communications_diameter_signaling_router 8.3.0.0 8.5.1.0.x
oracle / communications_webrtc_session_controller 7.2.0.0 7.2.0.0.x
oracle / communications_webrtc_session_controller 7.2.1 7.2.1.x
oracle / communications_service_broker 6.2 6.2.x
oracle / communications_unified_inventory_management 7.4.2 7.4.2.x
oracle / banking_loans_servicing 2.12.0 2.12.0.x
oracle / communications_network_charging_and_control 12.0.1.0.0 12.0.4.0.0.x
oracle / communications_network_charging_and_control 6.0.1.0.0 6.0.1.0.0.x
oracle / communications_convergent_charging_controller 6.0.1.0.0 6.0.1.0.0.x
oracle / communications_convergent_charging_controller 12.0.1.0.0 12.0.4.0.0.x
oracle / communications_billing_and_revenue_management 12.0.0.4 12.0.0.4.x
oracle / healthcare_data_repository 8.1.1 8.1.1.x
oracle / healthcare_translational_research 4.1.0 4.1.0.x
oracle / retail_service_backbone 19.0.1 19.0.1.x
oracle / retail_integration_bus 19.0.0 19.0.0.x
oracle / retail_integration_bus 19.0.1 19.0.1.x
oracle / retail_financial_integration 19.0.1 19.0.1.x
oracle / insurance_insbridge_rating_and_underwriting 5.2.0 5.2.0.x
oracle / hospitality_suite8 8.13.0 8.13.0.x
oracle / hospitality_suite8 8.14.0 8.14.0.x
oracle / agile_plm_mcad_connector 3.6 3.6.x
oracle / banking_enterprise_default_management 2.7.1 2.7.1.x
oracle / banking_deposits_and_lines_of_credit_servicing 2.12.0 2.12.0.x
oracle / communications_pricing_design_center 12.0.0.4 12.0.0.4.x
oracle / communications_pricing_design_center 12.0.0.5 12.0.0.5.x
oracle / communications_element_manager - 9.0
oracle / communications_session_report_manager - 9.0
oracle / communications_session_route_manager - 9.0
oracle / identity_management_suite 12.2.1.4.0 12.2.1.4.0.x
oracle / hyperion_data_relationship_management - 11.2.8.0
oracle / mysql_enterprise_monitor - 8.0.29.x
oracle / hyperion_infrastructure_technology - 11.2.8.0
oracle / communications_cloud_native_core_console 1.9.0 1.9.0.x
oracle / communications_cloud_native_core_policy 1.15.0 1.15.0.x
oracle / communications_cloud_native_core_unified_data_repository 1.15.0 1.15.0.x
oracle / communications_cloud_native_core_network_slice_selection_function 1.8.0 1.8.0.x
oracle / communications_cloud_native_core_network_repository_function 1.15.0 1.15.0.x
oracle / communications_cloud_native_core_network_function_cloud_native_environment 1.10.0 1.10.0.x
oracle / communications_cloud_native_core_service_communication_proxy 1.15.0 1.15.0.x
oracle / communications_cloud_native_core_network_repository_function 1.15.1 1.15.1.x
oracle / banking_payments 14.5 14.5.x
oracle / banking_trade_finance 14.5 14.5.x
oracle / banking_treasury_management 14.5 14.5.x
oracle / flexcube_universal_banking 14.5 14.5.x
oracle / retail_customer_insights 15.0.2 15.0.2.x
oracle / retail_customer_insights 16.0.2 16.0.2.x
oracle / communications_billing_and_revenue_management 12.0.0.5 12.0.0.5.x
oracle / hospitality_token_proxy_service 19.2 19.2.x
oracle / health_sciences_information_manager 3.0.1 3.0.4.x
oracle / payment_interface 20.3 20.3.x
oracle / payment_interface 19.1 19.1.x
oracle / retail_eftlink 21.0.0 21.0.0.x
oracle / retail_data_extractor_for_merchandising 16.0.2 16.0.2.x
oracle / retail_data_extractor_for_merchandising 15.0.2 15.0.2.x
oracle / retail_financial_integration 19.0.0 19.0.0.x
oracle / retail_store_inventory_management 14.1.3.5 14.1.3.5.x
oracle / retail_store_inventory_management 14.1.3.14 14.1.3.14.x
oracle / retail_store_inventory_management 15.0.3.3 15.0.3.3.x
oracle / retail_store_inventory_management 15.0.3.8 15.0.3.8.x
oracle / retail_store_inventory_management 16.0.3.7 16.0.3.7.x
oracle / retail_store_inventory_management 14.0.4.13 14.0.4.13.x
oracle / communications_convergence 3.0.3.0 3.0.3.0.x
oracle / sql_developer - 21.4.2
oracle / communications_user_data_repository 12.4 12.4.x
oracle / communications_eagle_element_management_system 46.6 46.6.x
oracle / management_cloud_engine 1.5.0 1.5.0.x
oracle / identity_manager_connector 9.1.0 9.1.0.x
oracle / flexcube_universal_banking 11.83.3 11.83.3.x
oracle / flexcube_universal_banking 12.1.0 12.4.x
oracle / enterprise_manager_for_peoplesoft 13.5.1.1 13.5.1.1.x
oracle / healthcare_translational_research 4.1.1 4.1.1.x
oracle / healthcare_master_person_index 5.0.1 5.0.1.x
oracle / healthcare_foundation 7.3.0.1 7.3.0.4.x
oracle / health_sciences_inform 6.3.2.1 6.3.2.1.x
oracle / health_sciences_inform 7.0.0.0 7.0.0.0.x
oracle / health_sciences_inform 6.2.1.1 6.2.1.1.x
oracle / health_sciences_empirica_signal 9.2.0.0 9.2.0.0.x
oracle / health_sciences_empirica_signal 9.1.0.6 9.1.0.6.x
oracle / insurance_insbridge_rating_and_underwriting 5.4 5.6.0.0.x
oracle / insurance_data_gateway 1.0.1 1.0.1.x
oracle / hyperion_tax_provision - 11.2.8.0
oracle / hyperion_profitability_and_cost_management - 11.2.8.0
oracle / hyperion_planning - 11.2.8.0
oracle / hyperion_bi+ - 11.2.8.0
oracle / retail_financial_integration 16.0.1 16.0.3.x
oracle / taleo_platform - 22.1
Maven icon org.apache.logging.log4j / log4j-core 2.4.0 2.12.3
Maven icon org.apache.logging.log4j / log4j-core 2.13.0 2.17.0
Maven icon org.apache.logging.log4j / log4j-core - 2.3.1

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.