Description
Wordpress is an open source CMS. A user with the ability to upload files (like an Author) can exploit an XML parsing issue in the Media Library leading to XXE attacks. This requires WordPress installation to be using PHP 8. Access to internal files is possible in a successful XXE attack. This has been patched in WordPress version 5.7.1, along with the older affected versions via a minor release. We strongly recommend you keep auto-updates enabled.
Remediation
References
Related Vulnerabilities
PHP Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2015-8393)
Twisted Web HTTP Server Improper Certificate Validation Vulnerability (CVE-2014-7143)
WordPress Plugin Connections Business Directory Unspecified Vulnerability (0.7.1.5)