[Japanese]

JVNDB-2021-000027

Multiple vulnerabilities in baserCMS

Overview

baserCMS provided by baserCMS Users Community contains multiple vulnerabilities listed below.

*Improper Neutralization of JavaScript input in the page editing function (CWE-79) - CVE-2021-20681
*OS command injection (CWE-78) - CVE-2021-20682
*Improper Neutralization of JavaScript input in the blog article editing function (CWE-79) - CVE-2021-20683

CVE-2021-20681, CVE-2021-20682
Sho Odagiri of Information Science College reported these vulnerabilities to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

CVE-2021-20683
Yamaguchi Kakeru 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 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
CVSS V2 Severity:
Base Metrics 3.5 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: Single Instance
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2021-20681

CVSS V3 Severity:
Base Metrics: 7.2 (High) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: High
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
CVSS V2 Severity:
Base Metrics: 6.5 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial
The above CVSS base scores have been assigned for CVE-2021-20682

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
CVSS V2 Severity:
Base Metrics: 3.5 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: Single
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2021-20683
Affected Products


baserCMS Users Community
  • baserCMS prior to 4.4.5

Impact

*An arbitrary script may be executed on the user's web browser - CVE-2021-20681, CVE-2021-20683
*An arbitrary OS command may be executed, by accessing the product with the administrator privileges - CVE-2021-20682
Solution

[Update the Software]
Update the software to the latest version according to the information provided by the developer.
Vendor Information

baserCMS Users Community
CWE (What is CWE?)

  1. OS Command Injection(CWE-78) [IPA Evaluation]
  2. Cross-site Scripting(CWE-79) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2021-20681
  2. CVE-2021-20682
  3. CVE-2021-20683
References

  1. JVN : JVN#64869876
  2. National Vulnerability Database (NVD) : CVE-2021-20681
  3. National Vulnerability Database (NVD) : CVE-2021-20682
  4. National Vulnerability Database (NVD) : CVE-2021-20683
Revision History

  • [2021/03/26]
      Web page was published

Date Public2021/03/26
Date First Published2021/03/26
Date Last Updated2021/03/26