WordPress — свободно распространяемая система управления содержимым сайта с открытым исходным кодом.

WordPress before 5.2.3 allows XSS in post previews by authenticated users.

WordPress before 5.2.3 allows XSS in media uploads because wp_ajax_upload_attachment is mishandled.

WordPress before 5.2.3 allows XSS in stored comments.

In WordPress before 5.2.3, validation and sanitization of a URL in wp_validate_redirect in wp-includes/pluggable.php could lead to an open redirect.

WordPress before 5.2.3 allows XSS in shortcode previews.

WordPress before 5.2.3 has an issue with URL sanitization in wp_kses_bad_protocol_once in wp-includes/kses.php that can lead to cross-site scripting (XSS) attacks.

WordPress before 5.8 lacks support for the Update URI plugin header. This makes it easier for remote attackers to execute arbitrary code via a supply-chain attack against WordPress installations that use any plugin for which the slug satisfies the naming constraints of the WordPress.org Plugin Directory but is not yet present in that directory.

WordPress before 5.5.2 allows CSRF attacks that change a theme's background image.

is_protected_meta in wp-includes/meta.php in WordPress before 5.5.2 allows arbitrary file deletion because it does not properly determine whether a meta key is considered protected.

is_blog_installed in wp-includes/functions.php in WordPress before 5.5.2 improperly determines whether WordPress is already installed, which might allow an attacker to perform a new installation, leading to remote code execution (as well as a denial of service for the old installation).