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CVE-2026-11961— User Registration & Membership < 5.2.3 - Unauthenticated Privilege Escalation via Unbound members_data Membership ID

Quick assessment

Affected
Unknown User Registration & Membership
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.

WordPress User Registration & Membership是WordPress基金会的一个用户注册与会员管理软件。 WordPress User Registration & Membership 5.2.3之前版本存在权限许可和访问控制问题漏洞，该漏洞源于未验证注册过程中提交的会员等级是否为表单允许的级别，可能导致未经验证的用户任意注册并获取管理员角色。

AI Predicted 9.8 Difficulty: Trivial EPSS 0.25% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown User Registration & Membership < 5.2.3 affected
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I. Basic Information for CVE-2026-11961

Vulnerability Information
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Vulnerability Title
User Registration & Membership < 5.2.3 - Unauthenticated Privilege Escalation via Unbound members_data Membership ID
Source: CVE Program / CVE List V5
Vulnerability Description
The User Registration & Membership WordPress plugin before 5.2.3 does not validate that the membership tier submitted during public registration is one of the tiers allowed by the registration form before assigning that tier's associated user role, allowing unauthenticated users to register into an arbitrary published membership tier and obtain its role — up to administrator when such a tier exists.
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
WordPress User Registration & Membership 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress User Registration & Membership是WordPress基金会的一个用户注册与会员管理软件。 WordPress User Registration & Membership 5.2.3之前版本存在权限许可和访问控制问题漏洞，该漏洞源于未验证注册过程中提交的会员等级是否为表单允许的级别，可能导致未经验证的用户任意注册并获取管理员角色。
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 User Registration & Membership 0 ~ 5.2.3 -

II. Public POCs for CVE-2026-11961

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III. Intelligence Information for CVE-2026-11961

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Vendor Advisories for CVE-2026-11961 (1)

Same Patch Batch · Unknown · 2026-07-17 · 7 CVEs total

CVE-2026-9810 AI Chatbot & Workflow Automation by AIWU < 1.5.4 - Unauthenticated Privilege Escalation vi
CVE-2026-13402 Royal Elementor Addons < 1.7.1063 - Unauthenticated Private Mega Menu Template Disclosure
CVE-2026-11966 User Registration & Membership < 5.2.3 - Unauthenticated Limited User Deletion via Stripe
CVE-2026-11575 PhonePe Payment Solutions < 3.1.0 - Unauthenticated Payment Bypass via Forged Callback
CVE-2026-10525 NEX-Forms < 9.2.3 - Unauthenticated Stored XSS via Form Submission
CVE-2026-12393 WPS Bookings for WooCommerce < 3.11.7 - Subscriber+ Arbitrary Booking Order Cancellation v

IV. Related Vulnerabilities

Same product: User Registration & Membership
Same vendor: Unknown

V. Comments for CVE-2026-11961

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