CVE-2021-20714Network attack vector

Arbitrary file deletion via directory traversal

Published Apr 27, 2021 · Updated Aug 3, 2024

Directory traversal in Emre Vona WP Fastest Cache before 0.9.1.7 allows remote authenticated users to delete arbitrary server files. Public advisories do not identify the request parameter, handler, or path-validation error that lets a supplied path escape its intended directory. A WordPress administrator account is required, and deletion is limited to files writable by the web-server process.

CVSS severity6.5
Medium
EPSS probability2.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Directory traversal in Emre Vona WP Fastest Cache before 0.9.1.7 allows remote authenticated users to delete arbitrary server files. Public advisories do not identify the request parameter, handler, or path-validation error that lets a supplied path escape its intended directory. A WordPress administrator account is required, and deletion is limited to files writable by the web-server process.

The record

CVE
CVE-2021-20714
Published
Apr 27, 2021
Updated
Aug 3, 2024
Vendor
Emre Vona
Product
WP Fastest Cache
Classifications
CWE-22, T1485
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 27, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=versions prior to 0.9.1.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Emre Vona · WP Fastest Cacheversion=versions prior to 0.9.1.7

Published CVSS scores

5.5NIST NVDAV:N/AC:L/Au:S/C:N/I:P/A:P
3.8JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
5.5JPCERT/CCAV:N/AC:L/Au:S/C:N/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1485Data Destruction

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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