SNS Vulnerability

WordPress VKontakte API Plugin "tagcloud" Cross-Site Scripting Vulnerability

Description

Henri Salo has discovered a vulnerability in the VKontakte API plugin for WordPress, which can be exploited by malicious people to conduct cross-site scripting attacks.
Input passed via the "tagcloud" parameter to wp-content/plugins/vkontakte-api/swf/tagcloud.swf (when "mode" is set to "tags") is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
The vulnerability is confirmed in version 2.7. Other versions may also be affected.

Vulnerable Products

Vulnerable Software:
WordPress VKontakte API Plugin 2.x

Solution

Fixed in the SVN repository. http://plugins.trac.wordpress.org/changeset/681320

CVE

References

Henri Salo:
http://www.openwall.com/lists/oss-security/2013/03/11/1

Vulnerability Manager Detection

IPS Protection

ASQ Engine alarm	Available Since
XSS - Prevention - GET : suspicious 'iframe' tag found in URL	3.2.0
XSS - Prevention - GET : suspicious 'meta' tag found in URL	3.2.0
XSS - Prevention - GET : suspicious tag with event found in URL	3.2.0
XSS - Prevention - GET : javascript code in flash clickTAG parameter	3.2.0
XSS - Prevention - GET : suspicious 'applet' tag found in URL	3.2.0
XSS - Phishing : suspicious 'div' tag found in URL	3.2.0
XSS - Prevention - GET : suspicious 'style' attribute found in URL	3.2.0
XSS - Prevention - GET : suspicious 'img' tag found in URL	3.2.0
XSS - Phishing : suspicious 'a' tag found in URL	3.2.0
XSS - Prevention - GET : cookie access attempt using script language found in URL	3.2.0
XSS - Prevention - GET : suspicious 'embed' tag found in URL	3.2.0
XSS - Prevention - GET : suspicious 'object' tag found in URL	3.2.0
XSS - Phishing : suspicious 'form' tag found in URL	3.2.0
XSS - Prevention - GET : javascript code found in URL	3.2.0
XSS - Prevention - GET : 'script' tag in flash clickTAG parameter	3.2.0
XSS - Prevention - GET : evasion attempt using tag characters encoding in URL	3.2.0
XSS - Prevention - GET : suspicious 'style' tag found in URL	3.2.0
XSS - Phishing : suspicious 'link' tag found in URL	3.2.0
XSS - Prevention - GET : 'script' tag found in URL	3.2.0
XSS - Prevention - GET : 'location' javascript object found in URL	3.2.0
XSS - Prevention - GET : suspicious 'div' tag found in URL	3.2.0
SQL injection Prevention - GET : Evasion attempt with CAST and EXEC statements	5.0.0

Risk level

Low

Vulnerability First Public Report Date

2013-03-11

Target Type

Server

Possible exploit

Remote