Description
Apache Commons Configuration uses a third-party library to parse YAML files which by default allows the instantiation of classes if the YAML includes special statements. Apache Commons Configuration versions 2.2, 2.3, 2.4, 2.5, 2.6 did not change the default settings of this library. So if a YAML file was loaded from an untrusted source, it could therefore load and execute code out of the control of the host application.
Remediation
References
Related Vulnerabilities
WordPress 5.1.x Multiple Vulnerabilities (5.1 - 5.1.8)
ReviveAdserver 7PK - Security Features Vulnerability (CVE-2016-9470)
WordPress Plugin Prismatic Multiple Cross-Site Scripting Vulnerabilities (2.7)
Envoy Proxy Use After Free Vulnerability (CVE-2023-35943)
Magento Improper Input Validation Vulnerability (CVE-2015-6497)