PT-2011-01: Cross-Site Scripting in Kayako Support Suite Vulnerable softwareKayako Support Suite Version: 3.70.02-stable and earlier Application link: http://www.kayako.com/Severity levelSeverity level: Medium Impact: Cross-Site Scripting Access Vector: Network exploitable CVSS v2: Base Score: 4.3 Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N)CVE: not assignedSoftware descriptionKayako Support Suite is a HelpDesk system.Vulnerability description Positive Research Center has discovered XSS in Kayako Support Suite.Application insufficiently verifies incoming data in "Subject" parameter in LiveSupport module. An attacker can use the vulnerability to inject and execute HTML code and scripts in a user's browser within the trust relationship between the browser and the server. An attack can be successful if administrator deletes a message created by user via Delete button of Options section of the message.Application insufficiently verifies incoming data in "Full Name" and "Subject" parameters in Tickets module. An attacker can use the vulnerability to inject and execute HTML code and scripts in a user's browser within the trust relationship between the browser and the server. An attack can be successful if administrator views task information via popup menu.Application insufficiently verifies incoming data in "Full Name" parameter in Kayako Support Suite (Tickets, News, Knowledgebase) modules. An attacker can use the vulnerability to inject and execute HTML code and scripts in a user's browser within the trust relationship between the browser and the server. A user can be successfully attacked via Tickets module if the user opens a page with opened tasks and if an attacker creates a task with special characters on behalf of the user. Other modules can execute arbitrary HTML code in a user's browser while viewing comments to any articles if an attacker manages to modify "Full Name" value for the current user. How to fixUpdate your software up to the v4 Advisory status25.11.2011 - Vendor is notified 25.11.2011 - Vendor gets vulnerability details 25.08.2011 - Vendor releases fixed version and details 29.12.2011 - Public disclosureCreditsThe vulnerability was discovered by Yuri Goltsev, Positive Research Center (Positive Technologies Company)Referenceshttp://en.securitylab.ru/lab/PT-2011-01Reports on the vulnerabilities previously discovered by Positive Research:http://www.ptsecurity.com/advisory1.aspx http://en.securitylab.ru/lab/