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Cross-site Scripting (XSS) Vulnerability WP Events Calendar

Advisory ID:HTB23037
Product:WP Events Calendar
Vendor:Luke Howell
Vulnerable Versions:6.7.11 and probably prior
Tested Version:6.7.11
Advisory Publication:August 10, 2011 [without technical details]
Vendor Notification:August 10, 2011
Public Disclosure:August 26, 2011
Vulnerability Type:Cross-Site Scripting [CWE-79]
Risk Level:Low
CVSSv2 Base Score:2.6 (AV:N/AC:H/Au:N/C:N/I:P/A:N)
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered vulnerability in WP Events Calendar, which can be exploited to perform cross-site scripting attacks.

1) Cross-site scripting (XSS) vulnerability in WP Events Calendar
Input passed via the "EC_id" GET parameter to /wp-admin/admin.php (when "page" is set to "events-calendar" and "EC_action" is set to "edit") 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 website. Successful exploitation requires that victim is logged-in into the application and has access to administrative interface.
Exploitation example:
http://[host]/wp-admin/admin.php?page=events-calendar&EC_action=edit&EC_id=% 22%3E%3Cscript%3Ealert%28document.cookie%29;%3C/script%3E
See also SA45717

How to Detect Cross-Site Scripting Vulnerabilities
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Solution:
Upgrade to version 6.7.12a.


References:
[1] High-Tech Bridge Advisory HTB23037 - https://www.immuniweb.com/advisory/HTB23037 - Cross-site Scripting (XSS) Vulnerability WP Events Calendar
[2] WP Events Calendar - wp-eventscalendar.com- Events-Calendar is a versatile replacement for the original calendar included with WordPress adding many useful functions to keep track of your events.
[3] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.

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