Cybozu Garoon vulnerable to cross-site request forgery


Cybozu Garoon provided by Cybozu,Inc. is a groupware. Cybozu Garoon contains a cross-site request forgery vulnerability (CWE-352).

Yasuda Yuya reported this vulnerability to Cybozu, Inc., and Cybozu, Inc. reported this vulnerability to JPCERT/CC to notify users of its solution through JVN. JPCERT/CC and Cybozu, Inc. coordinated under the Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 5.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Low
CVSS V2 Severity:
Base Metrics 2.6 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: High
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Partial
Affected Products

Cybozu, Inc.
  • Cybozu Garoon 3.0.0 to 4.2.2


If a user views a malicious page while logged in, the user may be forced to log out.

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Update to the latest version according to the information provided by the developer.
Vendor Information

Cybozu, Inc.
CWE (What is CWE?)

  1. Cross-Site Request Forgery(CWE-352) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2016-4909

  1. JVN : JVN#15222211
  2. National Vulnerability Database (NVD) : CVE-2016-4909
Revision History

  • [2016/12/19]
      Web page was published
      References : Content was added