CVE-2016-20075Public exploitNetwork attack vectorHinoki check available

Authenticated code execution via unrestricted custom-field upload

Published Jun 15, 2026 · Updated Jun 15, 2026

Arbitrary file upload in Ultimate Product Catalog 3.8.6 allows remote authenticated users to execute PHP code through custom fields. The Products-tab custom file field accepts executable PHP content and stores it in the web-accessible upcp-product-file-uploads directory. Contributor-level access is sufficient, and requesting the uploaded shell executes code with the WordPress server's privileges.

CVSS severity8.7
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Arbitrary file upload in Ultimate Product Catalog 3.8.6 allows remote authenticated users to execute PHP code through custom fields. The Products-tab custom file field accepts executable PHP content and stores it in the web-accessible upcp-product-file-uploads directory. Contributor-level access is sufficient, and requesting the uploaded shell executes code with the WordPress server's privileges.

The record

CVE
CVE-2016-20075
Published
Jun 15, 2026
Updated
Jun 15, 2026
Vendor
Etoile Web Design
Product
Ultimate Product Catalog
Classifications
CWE-863, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 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=3.8.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Etoile Web Design · Ultimate Product Catalogversion=3.8.6

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1505.003Server Software Component: Web 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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