[Japanese]

JVNDB-2021-000109

Multiple missing authorization vulnerabilities in WordPress Plugin "Advanced Custom Fields"

Overview

WordPress Plugin "Advanced Custom Fields" provided by Delicious Brains contains multiple missing authorization vulnerabilities listed below.

* Missing authorization related to database browsing (CWE-862) - CVE-2021-20865
* Missing authorization related to user list obtaining (CWE-862) - CVE-2021-20866
* Missing authorization related to field group movement (CWE-862) - CVE-2021-20867

Keitaro Yamazaki of Ierae Security, 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 4.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: None
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 4.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single Instance
  • Confidentiality Impact: Partial
  • Integrity Impact: None
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2021-20865

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: Low
  • Integrity Impact: None
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 4.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single
  • Confidentiality Impact: Partial
  • Integrity Impact: None
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2021-20866

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
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2021-20867
Affected Products


Delicious Brains
  • Advanced Custom Fields 5.11 prior to 5.11
  • Advanced Custom Fields Pro 5.11 prior to 5.11

Impact

A user with a lower level of authority than Editor role (such as Subscriber, Contributor, Author roles) may:
* View the information on the database without the access permission - CVE-2021-20865
* Obtain a list of information without the access permission - CVE-2021-20866
* Move the field group without the usage permission - CVE-2021-20867
Solution

[Update the plugin]
Update the plugin according to the information provided by the developer.
The developer has released the versions listed below that address the vulnerabilities.

* Advanced Custom Fields 5.11
* Advanced Custom Fields Pro 5.11
Vendor Information

Delicious Brains
CWE (What is CWE?)

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

  1. CVE-2021-20865
  2. CVE-2021-20866
  3. CVE-2021-20867
References

  1. JVN : JVN#09136401
  2. National Vulnerability Database (NVD) : CVE-2021-20865
  3. National Vulnerability Database (NVD) : CVE-2021-20866
  4. National Vulnerability Database (NVD) : CVE-2021-20867
Revision History

  • [2021/12/02]
      Web page was published
  • [2022/01/05]
      Overview was modified
      Impact was modified
      Solution was modified
  • [2022/02/18]
      Vendor Information : Content was added

Date Public2021/12/02
Date First Published2021/12/02
Date Last Updated2022/02/18