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<title>[59171] trunk/src/wp-includes/load.php: Bootstrap/Load: Prevent loopback scraping errors when there is no key or nonce.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/59171">59171</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/59171","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>jorbin</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2024-10-04 17:34:50 +0000 (Fri, 04 Oct 2024)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Bootstrap/Load: Prevent loopback scraping errors when there is no key or nonce.
For error detection and rollback functions WordPress also starts a loopback request to the homepage. This loopback request is made with special parameters that when they don't match, generates an erorr. This hardens that flow by exiting out of the check if the nonce or key is missing or the nonce is not saved in the DB. It further hardens it by not caching the failures and asking search engines not to index the url with the failures.
Props georgwordpress, swissspidy, jorbin.
Fixes <a href="https://core.trac.wordpress.org/ticket/62105">#62105</a>.</pre>
<h3>Modified Paths</h3>
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<li><a href="#trunksrcwpincludesloadphp">trunk/src/wp-includes/load.php</a></li>
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<h3>Diff</h3>
<a id="trunksrcwpincludesloadphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/load.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/load.php 2024-10-04 16:24:33 UTC (rev 59170)
+++ trunk/src/wp-includes/load.php 2024-10-04 17:34:50 UTC (rev 59171)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1806,8 +1806,20 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $key = substr( sanitize_key( wp_unslash( $_REQUEST['wp_scrape_key'] ) ), 0, 32 );
</span><span class="cx" style="display: block; padding: 0 10px"> $nonce = wp_unslash( $_REQUEST['wp_scrape_nonce'] );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( empty( $key ) || empty( $nonce ) ) {
+ return;
+ }
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( get_transient( 'scrape_key_' . $key ) !== $nonce ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $transient = get_transient( 'scrape_key_' . $key );
+ if ( false === $transient ) {
+ return;
+ }
+
+ if ( $transient !== $nonce ) {
+ if ( ! headers_sent() ) {
+ header( 'X-Robots-Tag: noindex' );
+ nocache_headers();
+ }
</ins><span class="cx" style="display: block; padding: 0 10px"> echo "###### wp_scraping_result_start:$key ######";
</span><span class="cx" style="display: block; padding: 0 10px"> echo wp_json_encode(
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span></span></pre>
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