CVE-2026-103889: File Upload RCE (CVSS 9.8)

Description

The 3D Product configurator for WooCommerce plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 2.16.2 via the 'xpv_image' parameter parameter. This is due to missing authentication and nonce checks on the wp_loaded handler combined with no sanitization of the xpv_image POST parameter before it is echoed unescaped into a Dompdf-rendered HTML template with PHP execution enabled. This makes it possible for unauthenticated attackers to execute code on the server. The only nonce and authentication check in the handler is entirely enclosed in a block comment with no replacement, making the endpoint reachable via a single unauthenticated POST to any URL on the site.

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CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0074

Probability of exploitation

0.54%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-434 Unrestricted Upload

References

Other References

https://plugins.trac.wordpress.org/browser/expivi/tags/2.16.2/classes/pdf/class-pdf.php#L34 https://plugins.trac.wordpress.org/browser/expivi/tags/2.16.2/classes/woocommerce/class-expivi-cart-manager.php#L212 https://plugins.trac.wordpress.org/browser/expivi/tags/2.16.2/classes/woocommerce/class-expivi-cart-manager.php#L238 https://plugins.trac.wordpress.org/browser/expivi/tags/2.16.2/classes/woocommerce/class-expivi-cart-manager.php#L598 https://plugins.trac.wordpress.org/browser/expivi/tags/2.16.2/classes/woocommerce/class-expivi-cart-manager.php#L95 https://plugins.trac.wordpress.org/browser/expivi/tags/2.16.2/templates/pdf/pdf-configuration-details.phtml#L199 https://plugins.trac.wordpress.org/changeset?reponame=&old=3723323%40expivi&new=3723323%40expivi https://www.wordfence.com/threat-intel/vulnerabilities/id/46f69f7b-6d9b-494d-b123-63fc5ebcb6f3?source=cve

Frequently Asked Questions

What is CVE-2026-103889? +

The 3D Product configurator for WooCommerce plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 2.16.2 via the 'xpv_image' parameter parameter. This is due to missing authentication and nonce checks on the wp_loaded handler combined with no sanitization of the xpv_image POST parameter before it is echoed unescaped into a Dompdf-rendered HTML template with PHP execution enabled. This makes it possible for unauthenticated attackers to execute code on the server. The only nonce and authentication check in the handler is entirely enclosed in a block comment with no replacement, making the endpoint reachable via a single unauthenticated POST to any URL on the site. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-103889? +

CVE-2026-103889 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0074, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-103889? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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