CVE-2021-4104: Apache LOG4J

High severity, CVSS 7.5. EPSS: 80.6% chance of exploitation in the next 30 days.

JMSAppender in Log4j 1.2 is vulnerable to deserialization of untrusted data when the attacker has write access to the Log4j configuration. The attacker can provide TopicBindingName and TopicConnectionFactoryBindingName configurations causing JMSAppender to perform JNDI requests that result in remote code execution in a similar fashion to CVE-2021-44228. Note this issue only affects Log4j 1.2 when specifically configured to use JMSAppender, which is not the default. Apache Log4j 1.2 reached end of life in August 2015. Users should upgrade to Log4j 2 as it addresses numerous other issues from the previous versions.

Affected products

Apache LOG4J: version 1.2 only
Fedoraproject Fedora: version 35 only
Oracle Advanced Supply Chain Planning: version 12.1 only; version 12.2 only
Oracle Business Intelligence: version 5.9.0.0.0 only; version 12.2.1.3.0 only; version 12.2.1.4.0 only
Oracle Business Process Management Suite: version 12.2.1.3.0 only; version 12.2.1.4.0 only
Oracle Communications Eagle FTP Table Base Retrieval: version 4.5 only
Oracle Communications Messaging Server: version 8.1 only
Oracle Communications Network Integrity: version 7.3.6 only
Oracle Communications Offline Mediation Controller: before 12.0.0.4.0 (fixed in 12.0.0.4.0); version 12.0.0.5.0 only
Oracle Communications Unified Inventory Management: version 7.3.4 only; version 7.3.5 only; version 7.4.1 only; version 7.4.2 only
Oracle E-Business Suite Cloud Manager And Cloud Backup Module: version 2.2.1.1.1 only
Oracle Enterprise Manager Base Platform: version 13.4.0.0 only; version 13.5.0.0 only
Oracle Financial Services Revenue Management And Billing Analytics: version 2.7.0.0 only; version 2.7.0.1 only; version 2.8.0.0 only
Oracle Fusion Middleware Common Libraries And Tools: version 12.2.1.4.0 only
Oracle Goldengate: affected versions not specified
Oracle Healthcare Data Repository: version 8.1.0 only
Oracle Hyperion Data Relationship Management: before 11.2.8.0 (fixed in 11.2.8.0)
Oracle Hyperion Infrastructure Technology: before 11.2.8.0 (fixed in 11.2.8.0)
Oracle Identity Management Suite: version 12.2.1.3.0 only; version 12.2.1.4.0 only
Oracle Jdeveloper: version 12.2.1.3.0 only
Oracle MySQL Enterprise Monitor: up to and including 8.0.29
Oracle Retail Allocation: version 14.1.3.2 only; version 15.0.3.1 only; version 16.0.3 only; version 19.0.1 only
Oracle Retail Extract Transform And Load: version 13.2.5 only
Oracle Stream Analytics: affected versions not specified
Oracle Timesten Grid: affected versions not specified
and 21 more

Published 2021-12-14. Last modified 2026-06-17.