CVE-2026-18391— WooCommerce Subscriptions < 9.1.0 - Unauthenticated RCE via PHP Object Injection
Possible ATT&CK Techniques 2AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Unknown | WooCommerce Subscriptions | 4.7.0< 9.1.0 | affected |
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I. Basic Information for CVE-2026-18391
Vulnerability Information
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Vulnerability Title
WooCommerce Subscriptions < 9.1.0 - Unauthenticated RCE via PHP Object Injection
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Automattic WooCommerce Subscriptions 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Automattic WooCommerce Subscriptions是美国Automattic公司的一个订阅管理扩展插件。 Automattic WooCommerce Subscriptions 9.1.0之前版本存在代码注入漏洞，该漏洞源于未验证用户输入即在启用High-Performance Order Storage的商店中对其进行反序列化，可能导致PHP对象注入，未认证用户可利用捆绑依赖中的gadget chain升级为远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Unknown | WooCommerce Subscriptions | 4.7.0 ~ 9.1.0 | - |
II. Public POCs for CVE-2026-18391
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-18391 (1)
- 🔗 WooCommerce Subscriptions < 9.1.0 – Unauthenticated RCE via PHP Object Injection | CVE 2026-18391 | Plugin Vulnerabilities Read full article exploitvdb-entrytechnical-description
Same Patch Batch · Unknown · 2026-08-12 · 44 CVEs total
| CVE-2026-16747 | 6.5 MEDIUM | Kirki < 6.2.1 - Unauthenticated Arbitrary Shortcode Execution via Form Email Actions |
| CVE-2026-15045 | 6.5 MEDIUM | Wallet System for WooCommerce < 2.7.10 - Customer+ Checkout Price Manipulation via Unvalid |
| CVE-2026-17008 | 5.3 MEDIUM | Quick PayPal Payments <= 5.7.50 - Unauthenticated Payment Bypass via PayPal IPN |
| CVE-2026-16990 | 5.3 MEDIUM | Payment Button for PayPal <= 1.2.3.44 - Unauthenticated Payment Price Manipulation |
| CVE-2026-15213 | 5.3 MEDIUM | Welcart e-Commerce < 2.11.33 - Unauthenticated Payment Bypass via Forged Settlement Callba |
| CVE-2026-16621 | 5.3 MEDIUM | Payment Gateway for PayPal on WooCommerce < 9.2.1 - Unauthenticated Payment Bypass via Pay |
| CVE-2026-18044 | 3.7 LOW | Estatik Real Estate Plugin < 4.3.4 - Unauthenticated Arbitrary-Recipient Mail Relay via Si |
| CVE-2026-13613 | KiviCare < 4.5.2 - Doctor/Receptionist+ SQL Injection via settings/listing REST Endpoint | |
| CVE-2026-16051 | WPMU DEV Dashboard < 5.0.1 - Remote Code Execution via Hub Install Action | |
| CVE-2026-13177 | Eventin < 4.1.20 - Contributor+ Order Information Disclosure via IDOR | |
| CVE-2026-12976 | LearnPress < 4.4.4 - Subscriber+ Sensitive Information Exposure via AI Assistant | |
| CVE-2026-13612 | KiviCare < 4.5.2 - Patient+ Cross-Patient Bill, Invoice and Appointment Disclosure via IDO | |
| CVE-2026-15249 | Patterns Kit <= 1.0.3 - Contributor+ Stored XSS via YouTube Popup Link | |
| CVE-2026-15039 | Gift Cards For WooCommerce Pro < 4.2.10 - Unauthenticated Arbitrary File Upload | |
| CVE-2026-15388 | Cookie Consent < 0.0.10 - Subscriber+ Consent Settings Update and Consent Log Disclosure | |
| CVE-2026-16538 | TeraWallet - Wallet for WooCommerce < 1.6.10 - Subscriber+ Wallet Balance Inflation via Di | |
| CVE-2026-16066 | Welcart e-Commerce < 2.11.34 - Author+ Stored XSS via Product Name | |
| CVE-2026-16253 | Total Upkeep (BoldGrid Backup) < 1.17.3 - Unauthenticated Sensitive Data Disclosure and Fo | |
| CVE-2026-16294 | Blubrry PowerPress < 11.17.1 - Contributor+ Server-Side Request Forgery via Podcast Episod | |
| CVE-2026-13171 | Eventin < 4.1.20 - Unauthenticated Account Creation via Waiting List Endpoint |
Showing top 20 of 44 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same vendor: Unknown
- CVE-2026-14832
ShopSmart Loyalty for WooCommerce <= 1.0.0 - Unauthenticated - CVE-2026-13700
WooMS <= 9.14 - Unauthenticated Server-Side Request Forgery - CVE-2026-19726
Visualizer < 4.0.7 - Contributor+ Cross-User Chart Configura - CVE-2026-19728
Extra Product Options Builder for WooCommerce < 1.2.176 - Un - CVE-2026-19725
WPvivid Backup & Migration < 0.9.131 - Unauthenticated Path
V. Comments for CVE-2026-18391
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