[Japanese]

JVNDB-2025-000076

Multiple vulnerabilities in ChatLuck

Overview

ChatLuck provided by NEOJAPAN Inc. contains multiple vulnerabilities listed below.
  • Cross-site scripting vulnerability in Chat Rooms (CWE-79) - CVE-2025-53858

  • Insufficient granularity of access control vulnerability in Invitation of Guest Users (CWE-1220) - CVE-2025-54461

  • Cross-site scripting vulnerability in Guest User Sign-up (CWE-79) - CVE-2025-58115

Kentaro Ishii of GMO Cybersecurity by Ierae, Inc. reported these vulnerabilities to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 6.1 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Changed
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2025-58115

CVSS V3 Severity:
Base Metrics:5.4 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: Required
  • Scope: Changed
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2025-53858

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: Low
  • Integrity Impact: None
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2025-54461
Affected Products


NEOJAPAN Inc.
  • ChatLuck V6.6 R2.0 and earlier (CVE-2025-53858, CVE-2025-54461)
  • ChatLuck V3.6 R1.0 to V6.6 R1.0 (CVE-2025-58115)

Impact

  • An arbitrary script may be executed on the web browser of the user who is accessing the product (CVE-2025-53858, CVE-2025-58115)

  • An uninvited guest user may register itself as a guest user (CVE-2025-54461)
Solution

[Update the software]
Update software to the latest version according to the information provided by the developer.
The developer has released the following updates that contain fixes for these vulnerabilities.
CVE-2025-53858, CVE-2025-54461
  • ChatLuck V6.7 R1.0

CVE-2025-58115
  • ChatLuck V6.6 R2.0

For more details, refer to the information provided by the developer.
Vendor Information

NEOJAPAN Inc.
CWE (What is CWE?)

  1. Cross-site Scripting(CWE-79) [IPA Evaluation]
  2. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2025-53858
  2. CVE-2025-54461
  3. CVE-2025-58115
References

  1. JVN : JVN#13030751
Revision History

  • [2025/10/16]
      Web page was published

Date Public2025/10/16
Date First Published2025/10/16
Date Last Updated2025/10/16