CVE-2026-18391

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CVSS 3.1

9.8 critical

EPSS

<1%p47

Published

Aug 12, 2026 (Aug 12, 2026)

Modified

Aug 26, 2026

Description

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.

Ecosystems: WordPress, E-commerce
Weakness: CWE-434
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.6%)

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