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CVE Record

CVE-2021-4371: WP Quick FrontEnd Editor <= 5.5 - Authenticated Settings Change

The WP Quick FrontEnd Editor plugin for WordPress is vulnerable to Setting Changs in versions up to, and including, 5.5. This is due to lacking both a security nonce and a capabilities check. This makes it possible for low-authenticated attackers to change plugin settings even when they do not have the capabilities to do so.

MediumCVSS 4.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This WordPress plugin flaw lets a logged-in low-privilege user change WP Quick FrontEnd Editor settings they should not control. The direct impact is integrity loss, not data theft or service outage, but settings changes can still affect site behavior and governance.

Executive priority

Treat this as a moderate-priority WordPress hygiene issue. It is not described as data compromise or active exploitation, but affected sites with many contributors or subscribers should remediate promptly.

Technical view

CVE-2021-4371 is a missing authorization issue in WP Quick FrontEnd Editor up to and including 5.5. The plugin lacks both a security nonce and a capability check for settings changes, allowing authenticated low-privilege users to modify plugin settings. CVSS is 4.3, with network access, low complexity, and required privileges.

Likely exposure

Exposure is limited to WordPress sites running WP Quick FrontEnd Editor versions described as up to and including 5.5, where untrusted or low-privilege authenticated accounts exist.

Exploitation context

The bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires authentication but no user interaction, and the documented impact is limited to unauthorized settings modification.

Researcher notes

Evidence supports CWE-862 missing authorization and integrity-only impact. The bundle contains an inconsistency: narrative references versions through 5.5, while affected metadata lists version 0 and defaultStatus unaffected. No source text in the bundle names a fixed version.

Mitigation direction

  • Inventory WordPress sites for WP Quick FrontEnd Editor installations.
  • Check the installed plugin version against vendor and WordPress plugin guidance.
  • If no supported fixed version is available, disable or remove the plugin.
  • Restrict low-privilege accounts on affected WordPress sites.
  • Review plugin settings for unauthorized changes.

Validation and detection

  • Confirm whether WP Quick FrontEnd Editor is installed on each WordPress site.
  • Record the installed plugin version and compare it to the <=5.5 affected range.
  • Review WordPress user roles for untrusted authenticated accounts.
  • Audit plugin configuration history or backups for unexpected settings changes.
  • Monitor security sources for any vendor-named fixed version.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-862: Authorization and privilege behavior lookup

Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2021-4371 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N2.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.3Medium
CVSS 3.1 vector shape for CVE-2021-4371Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
labibahmed42WP Quick FrontEnd Editor – WordPress Plugin0unaffected
Weakness

CWE details

CWE-862

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.