WordPress Plugin "WordPress Email Template Designer - WP HTML Mail" vulnerable to cross-site request forgery


WordPress Plugin "WordPress Email Template Designer - WP HTML Mail" provided by codemiq contains a cross-site request forgery vulnerability (CWE-352).

Konan Nagashima of Cryptography Laboratory,Department of Information and Communication Engineering,Tokyo Denki University reported this vulnerability to the developer and coordinated on his own.
After coordination was completed, this case was reported to IPA, and JPCERT/CC coordinated with the developer for the publication 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: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 2.6 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: High
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

  • WordPress Email Template Designer - WP HTML Mail versions prior to 3.0.8


If a user views a malicious page while logged in to the affected system with an administrative privilege, unintended operations may be performed.

[Update the plugin]
Update the plugin according to the information provided by the developer.
Vendor Information

CWE (What is CWE?)

  1. Cross-Site Request Forgery(CWE-352) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2021-20779

  1. JVN : JVN#42880365
  2. National Vulnerability Database (NVD) : CVE-2021-20779
Revision History

  • [2021/07/06]
      Web page was published