[Japanese]

JVNDB-2021-000902

Kagemai vulnerable to cross-site scripting

Overview

Kagemai <http://www.daifukuya.com/kagemai/> provided by daifukuya.com is a bug tracking system to share bug information of the software being developed among its development team.
Kagemai contains a stored cross-site scripting vulnerability (CWE-79) which allows an unintended script execution on the web browser of the user who can access an arbitrary web page.

During the meeting of Committee for authorizing the disclosure of unresolved vulnerabilities held on January 22, 2021, it was judged that an advisory for this vulnerability shall be disclosed since all the criteria and conditions described below which are stated in Standards for Handling Vulnerability related Information of Software Products and Other and Information Security Early Warning Partnership Guideline have been satisfied.

1. The developer of the product is unreachable.
2. Existence of vulnerability has been verified.
3. Not disclosing this case may result in the risk that product users will have no means to know of the existence of the vulnerability in the product.
4. There are no particular reasons that would make disclosure inappropriate.
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
CVSS V2 Severity:
Base Metrics 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products


daifukuya.com
  • kagemai 0.8.8

The above is the version reproduced the vulnerability by IPA based on the information provided.
Impact

An arbitrary script may be executed on the user's web browser.
Solution

[Consider stop using Kagemai 0.8.8]
Since the developer was unreachable, existence of any mitigations is unknown.
Vendor Information

CWE (What is CWE?)

  1. Cross-site Scripting(CWE-79) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2021-20686
References

  1. JVN : JVN#42220311
  2. National Vulnerability Database (NVD) : CVE-2021-20686
Revision History

  • [2021/03/25]
      Web page was published

Date Public2021/03/25
Date First Published2021/03/25
Date Last Updated2021/03/25