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  • branches/2.7/wp-includes/canonical.php

    r9883 r10506  
    120120            if ( $redirect_url = get_year_link(get_query_var('year')) )
    121121                $redirect['query'] = remove_query_arg('year', $redirect['query']);
    122         } elseif ( is_category() && !empty($_GET['cat']) ) {
     122        } elseif ( is_category() && !empty($_GET['cat']) && preg_match( '|^[0-9]+$|', $_GET['cat'] ) ) {
    123123            if ( $redirect_url = get_category_link(get_query_var('cat')) )
    124124                $redirect['query'] = remove_query_arg('cat', $redirect['query']);
     
    137137                // Strip off paging and feed
    138138                $paged_redirect['path'] = preg_replace('#/page/[0-9]+?(/+)?$#', '/', $paged_redirect['path']); // strip off any existing paging
    139                 $paged_redirect['path'] = preg_replace('#/(comments/?)?(feed|rss2?|rdf|atom)(/+)?$#', '/', $paged_redirect['path']); // strip off feed endings
     139                $paged_redirect['path'] = preg_replace('#/(comments/?)?(feed|rss2?|rdf|atom)(/+|$)#', '/', $paged_redirect['path']); // strip off feed endings
    140140                $paged_redirect['path'] = preg_replace('#/comment-page-[0-9]+?(/+)?$#', '/', $paged_redirect['path']); // strip off any existing comment paging
    141141            }
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