Description
WordPress is prone to multiple vulnerabilities, including XML External Entity injection and information disclosure vulnerabilities. Exploiting these issues could allow an attacker to obtain sensitive information which could be used to launch further attacks. WordPress versions 5.4.x ranging from 5.4 and up to (and including) 5.4.4 are vulnerable.
Remediation
Update to WordPress version 5.4.5 or latest
References
https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/
https://github.com/motikan2010/CVE-2021-29447
https://wordpress.org/support/wordpress-version/version-5-4-5/
Related Vulnerabilities
Oracle JRE CVE-2011-3544 Vulnerability (CVE-2011-3544)
Oracle Database Server CVE-2014-6537 Vulnerability (CVE-2014-6537)
WordPress Plugin Dynamic Widgets 'id' Parameter Cross-Site Scripting (1.5.1)
MySQL Other Vulnerability (CVE-2009-0819)
Python Improper Input Validation Vulnerability (CVE-2013-7338)