Changeset 46915 for branches/5.0/src/wp-includes/formatting.php

Timestamp:

12/12/2019 06:51:11 PM (6 years ago)

Author:

whyisjake

Message:

Ensure that a user can publish_posts before making a post sticky.
Props: danielbachhuber, whyisjake, peterwilson, xknown.
Prevent stored XSS through wp_targeted_link_rel().
Props: vortfu, whyisjake, peterwilsoncc, xknown, SergeyBiryukov, flaviozavan.
Update wp_kses_bad_protocol() to recognize : on uri attributes,
wp_kses_bad_protocol() makes sure to validate that uri attributes don't contain invalid/or not allowed protocols. While this works fine in most cases, there's a risk that by using the colon html5 named entity, one is able to bypass this function.
Brings r46895 to the 5.3 branch.
Props: xknown, nickdaugherty, peterwilsoncc.
Prevent stored XSS in the block editor.
Brings r46896 to the 5.3 branch.
Prevent escaped unicode characters become unescaped in unsafe HTML during JSON decoding.
Props: aduth, epiqueras.

Location:

branches/5.0

Files:

• . (modified) (1 prop)
• src/wp-includes/formatting.php (modified) (1 diff)

branches/5.0/src/wp-includes/formatting.php

@@ -4404 +4404 @@
 
 /**
+ * Remove non-allowable HTML from parsed block attribute values when filtering
+ * in the post context.
+ *
+ * @since 5.3.1
+ *
+ * @param string         $string            Content to be run through KSES.
+ * @param array[]|string $allowed_html      An array of allowed HTML elements
+ *                                          and attributes, or a context name
+ *                                          such as 'post'.
+ * @param string[]       $allowed_protocols Array of allowed URL protocols.
+ * @return string Filtered text to run through KSES.
+ */
+function wp_pre_kses_block_attributes( $string, $allowed_html, $allowed_protocols ) {
+    /*
+     * `filter_block_content` is expected to call `wp_kses`. Temporarily remove
+     * the filter to avoid recursion.
+     */
+    remove_filter( 'pre_kses', 'wp_pre_kses_block_attributes', 10 );
+    $string = filter_block_content( $string, $allowed_html, $allowed_protocols );
+    add_filter( 'pre_kses', 'wp_pre_kses_block_attributes', 10, 3 );
+
+    return $string;
+}
+
+/**
  * WordPress implementation of PHP sprintf() with filters.
  *