Published:2010/01/12  Last Updated:2010/01/14

WebCalenderC3 cross-site scripting vulnerability


WebCalenderC3 from C3 Corp. contains a cross-site scripting vulnerability.

Products Affected

  • WebCalenderC3 V0.32 and earlier


WebCalenderC3 from C3 Corp. is a calender software. WebCalenderC3 contains a cross-site scripting vulnerability.

According to the developer, they were not able to reproduce the vulnerability. However, to mitigate against potential security risks, the developer has released a security enhanced version.


An arbitrary script may be executed on the user's web browser.


Update the Software
Update to the latest version according to the information provided by the developer.

Vendor Status

Vendor Link
C3 Corp. WebCalenderC3 (Japanese Only)


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2010.01.12

Measures Conditions Severity
Access Required Routed - can be attacked over the Internet using packets
  • High
Authentication None - anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required Simple - the user must be convinced to take a standard action that does not feel harmful to most users, such as click on a link or view a file
  • Medium
Exploit Complexity Low - little to no expertise and/or luck required to exploit (cross-site scripting)
  • High

Description of each analysis measures


Masako Oono reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2010-0349
JVN iPedia JVNDB-2010-000002

Update History