emlog官方插件导致xss可打管理员cookie – 网站安全

<?php

while($res = $DB->fetch_array($query)):

$ishide = $res['hide']=='y'?'<font color="red">[待审]</font>':'';

$mail = !empty($res['mail']) ? "({$res['mail']})" : '';

$ip = !empty($res['ip']) ? "<br />IP：<a href=\"./plugin.php?plugin=anti_spam_comment&advance=true&ip={$res['ip']}\">{$res['ip']}</a>" : '';

$url = !empty($res['url']) ? "({$res['url']})" : '';

$res['content'] = str_replace('<br>',' ',$res['comment']);

$sub_content = subString($res['content'], 0, 50);

$res['title'] = subString($res['title'], 0, 42);

?>

<tr>

<td><input type="checkbox" value="<?php echo $res['cid']; ?>" name="com[]" class="ids" /></td>

<td><a href="./plugin.php?plugin=anti_spam_comment&advance=true&act=edit&cid=<?php echo $res['cid']; ?>" title="<?php echo $res['content']; ?>"><?php echo $sub_content; ?></a> <?php echo $ishide; ?>

<br /><?php echo smartDate($res['date']); ?>

<span style="display:none; margin-left:8px;">

<a href="javascript： asc_confirm(<?php echo $res['cid']; ?>, 'name');">屏蔽内容</a>

<a href="javascript： asc_confirm(<?php echo $res['cid']; ?>, 'url');">删除地址</a>

</span>

</td>

<td><a href="./plugin.php?plugin=anti_spam_comment&advance=true&poster=<?php echo urlencode($res['poster']);?>"><?php echo htmlspecialchars($res['poster']);?></a> <?php echo $url; ?> <?php echo $ip;?> <?php echo $mail;?></td>

<td><a href="./plugin.php?plugin=anti_spam_comment&advance=true&gid=<?php echo $res['gid']; ?>"><?php echo $res['title']; ?></a></td>

</tr>

<?php endwhile; ?>

    数据库中取出评论内容$res[‘comment’]，$sub_content取前50个字符就直接输出了。而且插入数据库时也未进行数据处理:     直接导致执行javascript：   可打cookie：  

  使用该cookie可以直接登录后台。 修复方案： echo htmlspecialchars($sub_content);