Cybozu Mailwise contains issue in preventing clickjacking attacks


Cybozu Mailwise contains multiple pages for editing/sending bulk emails. Some of these pages fail to protect against clickjacking attacks.

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

Cybozu, Inc.
  • Cybozu Mailwise version 5.0.0 through 5.3.2


If a user views a malicious page while logged in, the user may be tricked into conducting unintended operations.

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

Cybozu, Inc.
CWE (What is CWE?)

  1. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2016-4844

  1. JVN : JVN#04125292
  2. National Vulnerability Database (NVD) : CVE-2016-4844
Revision History

  • [2016/08/16]
      Web page was published
      References : Content was added