baserCMS vulnerable to arbitrary file uploads


baserCMS provided by baserCMS Users Community allows an authenticated user to upload arbitrary files (CWE-434).

Taisei Inoue of GMO Cybersecurity by Ierae, Inc. and Yusuke Akagi of Mitsui Bussan Secure Directions, Inc., Shiga Takuma of BroadBand Security, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under 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

baserCMS Users Community
  • baserCMS versions prior to 4.7.5


An user with Operator privilege may upload arbitrary files. As a result, arbitrary PHP code may be executed.

[Update the software]
Update the software to the latest version according to the information provided by the developer.
The developer released baserCMS 4.7.5 that contains a fix for this vulnerability.
Vendor Information

baserCMS Users Community
CWE (What is CWE?)

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

  1. CVE-2023-25655

  1. JVN : JVN#61105618
  2. National Vulnerability Database (NVD) : CVE-2023-25655
Revision History

  • [2023/03/27]
      Web page was published
  • [2023/06/01]
      Overview was modified
  • [2024/06/06]
      References : Content was added