Published:2021/12/02  Last Updated:2022/01/05

JVN#09136401
Multiple missing authorization vulnerabilities in WordPress Plugin "Advanced Custom Fields"

Overview

WordPress Plugin "Advanced Custom Fields" contains multiple missing authorization vulnerabilities.

Products Affected

  • Advanced Custom Fields versions prior to 5.11
  • Advanced Custom Fields Pro versions prior to 5.11

Description

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
    CVSS v3 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Base Score: 4.3
    CVSS v2 AV:N/AC:L/Au:S/C:P/I:N/A:N Base Score: 4.0
  • Missing authorization related to user list obtaining (CWE-862) - CVE-2021-20866
    CVSS v3 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Base Score: 4.3
    CVSS v2 AV:N/AC:L/Au:S/C:P/I:N/A:N Base Score: 4.0
  • Missing authorization related to field group movement (CWE-862) - CVE-2021-20867
    CVSS v3 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Base Score: 4.3
    CVSS v2 AV:N/AC:L/Au:S/C:N/I:P/A:N Base Score: 4.0

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

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Credit

Keitaro Yamazaki of Ierae Security, Inc reported these vulnerabilities to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2021-20865
CVE-2021-20866
CVE-2021-20867
JVN iPedia JVNDB-2021-000109

Update History

2022/01/05
Information under the section [Impact] was updated. The typos under the section [Impact], [Solution], [Credit] were fixed.