EasyCTF vulnerable to cross-site scripting


EasyCTF is a server side CGI used to score CTF (Capture The Flag). EasyCTF contains a cross-site scripting vulnerability (CWE-79) that can be leveraged by an attacker created account.

Shoji Baba reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V2 Severity:
Base Metrics 3.5 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: Single Instance
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

Hiroaki Sakai
  • EasyCTF -1.3 and earlier


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 Information

Hiroaki Sakai
CWE (What is CWE?)

  1. Cross-site Scripting(CWE-79) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2015-0913

  1. JVN : JVN#07538357
  2. National Vulnerability Database (NVD) : CVE-2015-0913
Revision History

  • [2015/05/01]
      Web page was published
      References : Content was added