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<title>[9329] sites/trunk/wordpress.org/public_html/wp-content/mu-plugins/pub/class-o2-follow.php: O2 Follow: Add warning about using data in other contexts.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="http://meta.trac.wordpress.org/changeset/9329">9329</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"http://meta.trac.wordpress.org/changeset/9329","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>iandunn</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2019-12-11 16:47:31 +0000 (Wed, 11 Dec 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'>O2 Follow: Add warning about using data in other contexts.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#sitestrunkwordpressorgpublic_htmlwpcontentmupluginspubclasso2followphp">sites/trunk/wordpress.org/public_html/wp-content/mu-plugins/pub/class-o2-follow.php</a></li>
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<h3>Diff</h3>
<a id="sitestrunkwordpressorgpublic_htmlwpcontentmupluginspubclasso2followphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/wordpress.org/public_html/wp-content/mu-plugins/pub/class-o2-follow.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/wordpress.org/public_html/wp-content/mu-plugins/pub/class-o2-follow.php 2019-12-11 07:47:00 UTC (rev 9328)
+++ sites/trunk/wordpress.org/public_html/wp-content/mu-plugins/pub/class-o2-follow.php 2019-12-11 16:47:31 UTC (rev 9329)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -16,6 +16,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> class o2_follow {
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // Use the old p2 meta key, for backwards compatibility.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Warning: Be careful using this in other contexts. See `subscribe_to_comments()` for details.
</ins><span class="cx" style="display: block; padding: 0 10px"> const USER_META_KEY = 'jpflfp2_posts_following';
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -310,6 +311,15 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $subscribed_ids[] = $post_id;
</span><span class="cx" style="display: block; padding: 0 10px"> $subscribed_ids = array_unique( $subscribed_ids );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ /*
+ * Warning: Be careful when using this data in any other context. It's not indexed by blog ID, so there's
+ * no way to know which post it actually refers to.
+ *
+ * For example, if you were to use it to email comment notifications to followers of a private post, you
+ * would also be emailing followers of posts on other sites which happened to have the same post ID, and
+ * would expose any sensitive information in those comments to random people who otherwise wouldn't have
+ * access to it.
+ */
</ins><span class="cx" style="display: block; padding: 0 10px"> update_user_meta( $current_user->ID, self::USER_META_KEY, $subscribed_ids );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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