Affecting wordpress package, versions debian:10: <5.0.4+dfsg1-1 || debian:8: <4.1.26+dfsg-1+deb8u1 || debian:9: * || debian:unstable: <5.1.1+dfsg1-1
WordPress before 5.1.1 does not properly filter comment content, leading to Remote Code Execution by unauthenticated users in a default configuration. This occurs because CSRF protection is mishandled, and because Search Engine Optimization of A elements is performed incorrectly, leading to XSS. The XSS results in administrative access, which allows arbitrary changes to .php files. This is related to wp-admin/includes/ajax-actions.php and wp-includes/comment.php.