Published:2015/02/27  Last Updated:2015/02/27

Joyful Note vulnerability in handling files


Joyful Note from KENT-WEB contains a vulnerability in handling files.

Products Affected

  • Joyful Note Ver 5.21 and earlier


Joyful Note from KENT-WEB is a bulletin board software that allows users to upload binary files such as image files. Joyful Note contains a vulnerability in handling files.


A remote attacker may create arbitrary files or delete existing files on the server. As a result, arbitrary code may be executed.


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

Vendor Status

Vendor Link
WebCreate Ltd Joyful Note


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2015.02.27 (CVSS Base Metrics)

What is CVSS?

Measures Severity Description
Access Vector(AV) Local (L) Adjacent Network (A) Network (N) A vulnerability exploitable with network access means the vulnerable software is bound to the network stack and the attacker does not require local network access or local access. Such a vulnerability is often termed "remotely exploitable".
Access Complexity(AC) High (H) Medium (M) Low (L) Specialized access conditions or extenuating circumstances do not exist.
Authentication(Au) Multiple (M) Single (S) None (N) Authentication is not required to exploit the vulnerability.
Confidentiality Impact(C) None (N) Partial (P) Complete (C) There is considerable informational disclosure. Access to some system files is possible, but the attacker does not have control over what is obtained, or the scope of the loss is constrained.
Integrity Impact(I) None (N) Partial (P) Complete (C) Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.
Availability Impact(A) None (N) Partial (P) Complete (C) There is reduced performance or interruptions in resource availability.

Base Score:7.5


Shoji Baba reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2015-0889
JVN iPedia JVNDB-2015-000024