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<title>[45973] Improve URL validation in `wp_validate_redirect()`.</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/45973">45973</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/45973","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2019-09-04 16:58:39 +0000 (Wed, 04 Sep 2019)</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'>Improve URL validation in `wp_validate_redirect()`.
Merges <a href="https://core.trac.wordpress.org/changeset/45971">[45971]</a> to the 5.1 branch.
Props vortfu, whyisjake, peterwilsoncc.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branches51srcwpincludespluggablephp">branches/5.1/src/wp-includes/pluggable.php</a></li>
</ul>
<h3>Property Changed</h3>
<ul>
<li><a href="#branches51">branches/5.1/</a></li>
</ul>
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<div id="patch">
<h3>Diff</h3>
<span class="cx" style="display: block; padding: 0 10px">Index: branches/5.1
</span><span class="cx" style="display: block; padding: 0 10px">===================================================================
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">--- branches/5.1 2019-09-04 16:57:35 UTC (rev 45972)
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+++ branches/5.1 2019-09-04 16:58:39 UTC (rev 45973)
</ins><a id="branches51"></a>
<div class="propset"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Property changes: branches/5.1</h4>
<pre class="diff"><span>
</span></pre></div>
<a id="svnmergeinfo"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: svn:mergeinfo</h4></div>
<span class="cx" style="display: block; padding: 0 10px"> /branches/3.4:21757
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/4.9:43557,43622
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/5.0:43681-43682,43684-43688,43719-43720,43723,43726-43727,43729-43731,43734-43744,43747,43751-43754,43758,43760-43765,43767-43770,43772,43774-43781,43783,43785,43790-43806,43808-43821,43825,43828,43830-43834,43836-43843,43846-43863,43867-43889,43891-43894,43897-43905,43908-43909,43911-43929,43931-43942,43946-43947,43949-43956,43959-43964,43967-43969,43988,43994,44014,44017,44047,44183,44185,44187-44206,44208-44213,44231-44232,44235,44248,44284,44287-44288
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-/trunk:44744,44747-44749,44760,44762,44768-44769,44788,44794,44797,44799,44801,44805-44806,44814,44816,44829,44833,44842,44858,44925-44926,44993,45936
</del><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/trunk:44744,44747-44749,44760,44762,44768-44769,44788,44794,44797,44799,44801,44805-44806,44814,44816,44829,44833,44842,44858,44925-44926,44993,45936,45971
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches51srcwpincludespluggablephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.1/src/wp-includes/pluggable.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.1/src/wp-includes/pluggable.php 2019-09-04 16:57:35 UTC (rev 45972)
+++ branches/5.1/src/wp-includes/pluggable.php 2019-09-04 16:58:39 UTC (rev 45973)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1396,6 +1396,14 @@
</span><span class="cx" style="display: block; padding: 0 10px"> return $default;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! isset( $lp['host'] ) && ! empty( $lp['path'] ) && '/' !== $lp['path'][0] ) {
+ $path = '';
+ if ( ! empty( $_SERVER['REQUEST_URI'] ) ) {
+ $path = dirname( parse_url( 'http://placeholder' . $_SERVER['REQUEST_URI'], PHP_URL_PATH ) . '?' );
+ }
+ $location = '/' . ltrim( $path . '/', '/' ) . $location;
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> // Reject if certain components are set but host is not. This catches urls like https:host.com for which parse_url does not set the host field.
</span><span class="cx" style="display: block; padding: 0 10px"> if ( ! isset( $lp['host'] ) && ( isset( $lp['scheme'] ) || isset( $lp['user'] ) || isset( $lp['pass'] ) || isset( $lp['port'] ) ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> return $default;
</span></span></pre>
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