CVE-2021-4383Network attack vector

Subscriber page modification via unchecked post update

Published Jun 7, 2023 · Updated Apr 8, 2026

Missing authorization in WP Quick FrontEnd Editor 5.5 and earlier allows remote authenticated users to modify any WordPress page or post. The plugin.class.php save_content_front AJAX handler copies request-supplied identifiers and content into wp_update_post without a capability check. Subscriber access is sufficient to overwrite or create any site page or post, with no reported confidentiality impact.

CVSS severity8.1
High
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in WP Quick FrontEnd Editor 5.5 and earlier allows remote authenticated users to modify any WordPress page or post. The plugin.class.php save_content_front AJAX handler copies request-supplied identifiers and content into wp_update_post without a capability check. Subscriber access is sufficient to overwrite or create any site page or post, with no reported confidentiality impact.

The record

CVE
CVE-2021-4383
Published
Jun 7, 2023
Updated
Apr 8, 2026
Vendor
Labib Ahmed
Product
WP Quick FrontEnd Editor
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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=0 <=5.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Labib Ahmed · WP Quick FrontEnd Editorversion=0 <=5.5

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
8.1WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

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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