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Edit File: class-wp-simplepie-sanitize-kses.php
<?php /** * Feed API: WP_SimplePie_Sanitize_KSES class * * @package WordPress * @subpackage Feed * @since 4.7.0 */ // Don't load directly. if ( ! defined( 'ABSPATH' ) ) { die( '-1' ); } /** * Core class used to implement SimplePie feed sanitization. * * Extends the SimplePie\Sanitize class to use KSES, because * we cannot universally count on DOMDocument being available. * * @since 3.5.0 */ #[AllowDynamicProperties] class WP_SimplePie_Sanitize_KSES extends SimplePie\Sanitize { /** * WordPress SimplePie sanitization using KSES. * * Sanitizes the incoming data, to ensure that it matches the type of data expected, using KSES. * * @since 3.5.0 * * @param mixed $data The data that needs to be sanitized. * @param int $type The type of data that it's supposed to be. * @param string $base Optional. The `xml:base` value to use when converting relative * URLs to absolute ones. Default empty. * @return mixed Sanitized data. */ public function sanitize( $data, $type, $base = '' ) { $data = trim( $data ); if ( $type & SimplePie\SimplePie::CONSTRUCT_MAYBE_HTML ) { if ( preg_match( '/(&(#(x[0-9a-fA-F]+|[0-9]+)|[a-zA-Z0-9]+)|<\/[A-Za-z][^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3E]*' . SIMPLEPIE_PCRE_HTML_ATTRIBUTE . '>)/', $data ) ) { $type |= SimplePie\SimplePie::CONSTRUCT_HTML; } else { $type |= SimplePie\SimplePie::CONSTRUCT_TEXT; } } if ( $type & SimplePie\SimplePie::CONSTRUCT_BASE64 ) { $data = base64_decode( $data ); } if ( $type & ( SimplePie\SimplePie::CONSTRUCT_HTML | \SimplePie\SimplePie::CONSTRUCT_XHTML ) ) { $data = wp_kses_post( $data ); if ( 'UTF-8' !== $this->output_encoding ) { $data = $this->registry->call( 'Misc', 'change_encoding', array( $data, 'UTF-8', $this->output_encoding ) ); } return $data; } else { return parent::sanitize( $data, $type, $base ); } } }