WordPress plugin "WP Fastest Cache" vulnerable to directory traversal


WordPress plugin "WP Fastest Cache" provided by Emre Vona contains a directory traversal vulnerability (CWE-22).

Gen Sato of Mitsui Bussan Secure Directions, Inc. reported this vulnerability to the developer and coordinated on his own.
After coordination was completed, this case was reported to JPCERT/CC, and JPCERT/CC coordinated with the developer for the publication.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 3.8 (Low) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: High
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: Low
CVSS V2 Severity:
Base Metrics 5.5 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single Instance
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: Partial
Affected Products

Emre Vona
  • WP Fastest Cache prior to


Arbitrary files on the server may be deleted by a user with an administrative privilege.

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

Emre Vona
CWE (What is CWE?)

  1. Path Traversal(CWE-22) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2021-20714

  1. JVN : JVN#35240327
  2. National Vulnerability Database (NVD) : CVE-2021-20714
Revision History

  • [2021/04/27]
      Web page was published