Cybozu Garoon vulnerable to improper input validation


Cybozu Garoon provided by Cybozu, Inc. contains an improper input validation vulnerability (CWE-20).

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: Low
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 4.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single Instance
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

Cybozu, Inc.
  • Cybozu Garoon 5.0.0 to 5.0.2


A user who can login to the product may delete some data of the bulletin board.

[Update the software and Apply the patch]
Update the software to Cybozu Garoon version 5.0.2, and then apply the patch according to the information provided by the developer.

[Updated on 2021 August 2]
[Update the Software]
The developer has released the version that contains a fix for this vulnerability.
Update to the latest version according to the information provided by the developer.
Vendor Information

Cybozu, Inc.
CWE (What is CWE?)

  1. Improper Input Validation(CWE-20) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2020-5643

  1. JVN : JVN#57942454
Revision History

  • [2020/11/05]
      Web page was published
  • [2021/08/02]
     Solution : Content was added