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Cross-site Scripting (XSS) Vulnerability in AJAX Calendar

Advisory ID:HTB22973
Product:AJAX Calendar
Vendor:OpenCrypt
Vulnerable Versions:1.0 and probably prior
Tested Version:1.0
Advisory Publication:April 21, 2011 [without technical details]
Vendor Notification:April 21, 2011
Public Disclosure:May 5, 2011
Vulnerability Type:Cross-Site Scripting [CWE-79]
Risk Level:Medium
CVSSv2 Base Score:4.3 (AV:N/AC:M/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 AJAX Calendar which could be exploited to perform cross-site scripting attacks.

1) Cross-site scripting (XSS) vulnerability in AJAX Calendar
The vulnerability exists due to input sanitation error in the "y" parameter in example.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website.
Exploitation example:
http://[host]/example.php?y=1%27%22%3E%3Cscript%3Ealert%28123%29;%3C/script% 3E

How to Detect Cross-Site Scripting Vulnerabilities
Website Security Test
  • GDPR & PCI DSS Test
  • Website CMS Security Test
  • CSP & HTTP Headers Check
  • WordPress & Drupal Scanning
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Solution:
Upgrade to the most recent version


References:
[1] High-Tech Bridge Advisory HTB22973 - https://www.immuniweb.com/advisory/HTB22973 - Cross-site Scripting (XSS) Vulnerability in AJAX Calendar
[2] AJAX Calendar - www.opencrypt.com – AJAX Calendar is an application that uses Ajax Techniques to create professional dynamic Calendar for web project .
[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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