CVE-2026-18391
WooCommerce Subscriptions < 9.1.0 - Unauthenticated RCE via PHP Object Injection
- State
- Published
- Severity
- 9.8 Critical
- Published
- Aug 12, 2026
- Updated
- Aug 12, 2026
- Reserved
- Jul 30, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-434 Unrestricted Upload of File with Dangerous Type
Affected Products
| Product | Versions |
|---|---|
WooCommerce SubscriptionsUnknown |
|
References
- https://wpscan.com/vulnerability/191f76cf-e5bd-4a37-ac1c-9187cea2aa27/exploitvdb-entrytechnical-description
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