$text = preg_replace('/\<([^>]*?)(src|href)=(.*?)\&\;(.*?)\>/ism', '<$1$2=$3&$4>', $text);
// sanitizes src attributes (http and redir URLs for displaying in a web page, cid used for inline images in emails)
- $allowed_src_protocols = ['http', 'redir', 'cid'];
+ $allowed_src_protocols = ['//', 'http', 'redir', 'cid'];
$text = preg_replace('#<([^>]*?)(src)="(?!' . implode('|', $allowed_src_protocols) . ')(.*?)"(.*?)>#ism',
'<$1$2=""$4 data-original-src="$3" class="invalid-src" title="' . L10n::t('Invalid source protocol') . '">', $text);
// Always allowed protocol even if config isn't set or not including it
$allowed_link_protocols[] = 'http';
+ $allowed_link_protocols[] = '//';
$allowed_link_protocols[] = 'redir/';
$regex = '#<([^>]*?)(href)="(?!' . implode('|', $allowed_link_protocols) . ')(.*?)"(.*?)>#ism';