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CVE-2026-81431— Registration Form for WooCommerce 1.1.0 - 1.1.2 - Contributor+ Privilege Escalation via Unvalidated tgwcfb_id

Quick assessment

Affected
Unknown Registration Form for WooCommerce
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WooCommerce 注册表单（Registration Form）插件在 1.1.3 版本之前未验证注册过程中引用的表单是否为合法的注册表单，而是从攻击者可控的任意文章（post）中读取允许的角色白名单。因此，能够创建文章的用户（Contributor 及以上权限）可以注册新账户并指定任意角色（包括管理员），从而导致站点被完全接管。此漏洞是 CVE-2026-54807 的不完全修复。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.46% · P40

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Registration Form for WooCommerce 1.1.0< 1.1.3 affected
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I. Basic Information for CVE-2026-81431

Vulnerability Information
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Vulnerability Title
Registration Form for WooCommerce 1.1.0 - 1.1.2 - Contributor+ Privilege Escalation via Unvalidated tgwcfb_id
Source: CVE Program / CVE List V5
Vulnerability Description
The Registration Form for WooCommerce WordPress plugin before 1.1.3 does not validate that the form referenced during registration is a legitimate registration form, reading the permitted-role allow-list from an arbitrary attacker-controlled post instead. A user able to create a post (Contributor and above) can therefore register a new account with an arbitrary role, including Administrator, leading to full site takeover. This is an incomplete fix of CVE-2026-54807.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Registration Form for WooCommerce 1.1.0 ~ 1.1.3 -

II. Public POCs for CVE-2026-81431

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III. Intelligence Information for CVE-2026-81431

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Proof of Concept for CVE-2026-81431 (1)

Same Patch Batch · Unknown · 2026-09-10 · 8 CVEs total

CVE-2026-82925 Site Reviews 7.2.2 - 8.2.2 - Unauthenticated PHP Object Injection via Form Signature
CVE-2026-77770 miniOrange 2FA (Free & Pro) - Unauthenticated Arbitrary Option Deletion via Out-of-Band Em
CVE-2026-77771 miniOrange 2FA (Free & Pro) - 2FA Bypass via Session-Scoped OTP Lockout
CVE-2026-78361 zipMoney(Zip Co) Payments Plugin for WooCommerce < 2.4.0 - Unauthenticated Arbitrary Optio
CVE-2026-19840 Notiqoo < 1.4.14 - Contributor+ Arbitrary Option Update via Multiple AJAX Actions
CVE-2026-19436 Ultimate Gift Cards For WooCommerce < 3.2.10 - Unauthenticated Gift Card Value Inflation v
CVE-2026-19439 Ultimate Gift Cards for WooCommerce 3.0.3 - 3.2.9 - Unauthenticated Gift Card Code and Cus

IV. Related Vulnerabilities

Same product: Registration Form for WooCommerce
Same vendor: Unknown