Name: CVE-2026-18391: Unrestricted Upload of File with Dangerous Type
Creator: Rapid7
Published: 2026-08-12T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-18391, CWE-434, CVSS 9.8, EPSS 0.00278

The WooCommerce Subscriptions WordPress plugin before 9.1.0 does not validate user input before unserializing it on stores with High-Performance Order Storage enabled, leading to a PHP Object Injection issue which unauthenticated users can escalate to Remote Code Execution via a gadget chain present in the bundled dependencies.

CVSS Details

CVSS 3.1 Base Score: 9.8
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Woocommerce Subscriptions Plugin	—	Update woocommerce-subscriptions plugin to version 9.1.0, or a newer patched version	Oct 30, 2026	Aug 14, 2026

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CVSS Details

Covered by Rapid7

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