CVE-2021-47965Public exploitNetwork attack vector

Unauthenticated code execution via unrestricted FCKeditor upload

Published May 15, 2026 · Updated May 15, 2026

Unrestricted file upload in WP Super Edit 2.5.4 and earlier allows remote attackers to execute code through the FCKeditor filemanager. The bundled upload handler accepts attacker-controlled files without validating dangerous file types, allowing executable content into the web application environment. No authentication or user interaction is required; executing an uploaded server-side file compromises the WordPress host under the web server process's privileges.

CVSS severity9.3
Critical
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in WP Super Edit 2.5.4 and earlier allows remote attackers to execute code through the FCKeditor filemanager. The bundled upload handler accepts attacker-controlled files without validating dangerous file types, allowing executable content into the web application environment. No authentication or user interaction is required; executing an uploaded server-side file compromises the WordPress host under the web server process's privileges.

The record

CVE
CVE-2021-47965
Published
May 15, 2026
Updated
May 15, 2026
Vendor
Ahmad Awais
Product
WP Super Edit
Classifications
CWE-434, T1190, T1505.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2026CVE publishedPublication date reported by the CVE source.
  2. May 15, 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=2.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ahmad Awais · WP Super Editversion=2.5.4

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application
T1505.003Web Shell

Public exploit references

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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