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KSES: Allow HTML data-* attributes.

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Add global support for HTML attributes prefixed `data-` for authors and contributors, as required by the new editor.

Props azaozz, peterwilsoncc.
Fixes #33121.

Built from https://develop.svn.wordpress.org/branches/5.0@43727


git-svn-id: http://core.svn.wordpress.org/branches/5.0@43556 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Peter Wilson 2018-10-15 05:22:25 +00:00
parent 73f5d3d4d9
commit 4b3d92a0db
2 changed files with 27 additions and 5 deletions
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26
wp-includes/kses.php
View File

@ -854,6 +854,7 @@ function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
* Determine whether an attribute is allowed.
*
* @since 4.2.3
* @since 5.0.0 Add support for `data-*` wildcard attributes.
*
* @param string $name The attribute name. Returns empty string when not allowed.
* @param string $value The attribute value. Returns a filtered value.
@ -864,13 +865,32 @@ function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
* @return bool Is the attribute allowed?
*/
function wp_kses_attr_check( &$name, &$value, &$whole, $vless, $element, $allowed_html ) {
$allowed_attr = $allowed_html[strtolower( $element )];
$allowed_attr = $allowed_html[ strtolower( $element ) ];
$name_low = strtolower( $name );
if ( ! isset( $allowed_attr[$name_low] ) || '' == $allowed_attr[$name_low] ) {
/*
* Allow `data-*` attributes.
*
* When specifying `$allowed_html`, the attribute name should be set as
* `data-*` (not to be mixed with the HTML 4.0 `data` attribute, see
* https://www.w3.org/TR/html40/struct/objects.html#adef-data).
*
* Note: the attribute name should only contain `A-Za-z0-9_-` chars,
* double hyphens `--` are not accepted by WordPress.
*/
if ( strpos( $name_low, 'data-' ) === 0 && ! empty( $allowed_attr['data-*'] ) && preg_match( '/^data(?:-[a-z0-9_]+)+$/', $name_low, $match ) ) {
/*
* Add the whole attribute name to the allowed attributes and set any restrictions
* for the `data-*` attribute values for the current element.
*/
$allowed_attr[ $match[0] ] = $allowed_attr['data-*'];
} else {
$name = $value = $whole = '';
return false;
}
}
if ( 'style' == $name_low ) {
$new_value = safecss_filter_attr( $value );
@ -884,7 +904,7 @@ function wp_kses_attr_check( &$name, &$value, &$whole, $vless, $element, $allowe
$value = $new_value;
}
if ( is_array( $allowed_attr[$name_low] ) ) {
if ( is_array( $allowed_attr[ $name_low ] ) ) {
// there are some checks
foreach ( $allowed_attr[$name_low] as $currkey => $currval ) {
if ( ! wp_kses_check_attr_val( $value, $vless, $currkey, $currval ) ) {
@ -1808,6 +1828,7 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
* Helper function to add global attributes to a tag in the allowed html list.
*
* @since 3.5.0
* @since 5.0.0 Add support for `data-*` wildcard attributes.
* @access private
*
* @param array $value An array of attributes.
@ -1820,6 +1841,7 @@ function _wp_add_global_attributes( $value ) {
'style' => true,
'title' => true,
'role' => true,
'data-*' => true,
);
if ( true === $value )

2
wp-includes/version.php
View File

@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
$wp_version = '5.0-alpha-43726';
$wp_version = '5.0-alpha-43727';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.