CVE-2025-39557Network attack vector

Admin-level web-shell upload via missing file validation

Published Apr 16, 2025 · Updated Apr 28, 2026

Unrestricted file upload in StellarWP Kadence WooCommerce Email Designer 1.5.14 and earlier allows remote authenticated users to place web shells. Public advisories identify missing file-type validation in the settings-import path but do not disclose the precise upload handler or storage operation. Administrator-level access is required, and a stored executable file enables server-side code execution in the WordPress site's context.

CVSS severity9.1
Critical
EPSS probability0.61%
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 StellarWP Kadence WooCommerce Email Designer 1.5.14 and earlier allows remote authenticated users to place web shells. Public advisories identify missing file-type validation in the settings-import path but do not disclose the precise upload handler or storage operation. Administrator-level access is required, and a stored executable file enables server-side code execution in the WordPress site's context.

The record

CVE
CVE-2025-39557
Published
Apr 16, 2025
Updated
Apr 28, 2026
Vendor
Liquid Web
Product
Kadence WooCommerce Email Designer
Classifications
CWE-434, CAPEC-650, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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 <=1.5.14 changes=[{"at":"1.5.15","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Liquid Web · Kadence WooCommerce Email Designerversion=0 <=1.5.14 changes=[{"at":"1.5.15","status":"unaffected"}]

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
9.1PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-650Upload a Web Shell to a Web Server
T1505.003Server Software Component: Web Shell

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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