CVE-2022-0316Public exploitNetwork attack vector

Unauthenticated file upload via unchecked language endpoint

Published Jan 23, 2023 · Updated Apr 3, 2025

Unrestricted file upload in multiple WordPress themes allows remote attackers to place arbitrary files on the web server without authentication. The include/lang_upload.php endpoint accepts the mofile[] multipart field and writes the supplied file into the theme's languages directory without authorization or file-type validation. A network request alone can plant an attacker-controlled PHP file, which the public proof of concept retrieves from the web-accessible theme path.

CVSS severity9.8
Critical
EPSS probability2.08%
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 multiple WordPress themes allows remote attackers to place arbitrary files on the web server without authentication. The include/lang_upload.php endpoint accepts the mofile[] multipart field and writes the supplied file into the theme's languages directory without authorization or file-type validation. A network request alone can plant an attacker-controlled PHP file, which the public proof of concept retrieves from the web-accessible theme path.

The record

CVE
CVE-2022-0316
Published
Jan 23, 2023
Updated
Apr 3, 2025
Vendor
PixFill
Product
Kings Club
Classifications
CWE-434, CAPEC-1, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 2025Record 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 <=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PixFill · Kings Clubversion=0 <=*
ChimpGroup · Spikesversion=0 <=*
ChimpGroup · WeStandversion=0 <2.1
ChimpGroup · Bolsterversion=0 <=*

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs
T1190Exploit Public-Facing Application

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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