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CVE-2026-11963— User Registration & Membership < 5.2.2 - Subscriber+ Cross-User Role and Membership Tier Modification via IDOR

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.

wpeverest user registration & membership是wpeverest公司开源的一个用户注册与会员管理插件。 WordPress user registration & membership 5.2.2之前版本存在授权问题漏洞，该漏洞源于对会员升级操作未执行授权检查，并且从调用者提供的标识符中派生要修改的用户，可能导致任何经过身份验证的用户更改其他用户的WordPress角色和会员等级。

AI Predicted 8.2 Difficulty: Easy EPSS 0.35% · P26

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown User Registration & Membership < 5.2.2 affected
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I. Basic Information for CVE-2026-11963

Vulnerability Information
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Vulnerability Title
User Registration & Membership < 5.2.2 - Subscriber+ Cross-User Role and Membership Tier Modification via IDOR
Source: CVE Program / CVE List V5
Vulnerability Description
The User Registration & Membership WordPress plugin before 5.2.2 does not perform an authorization check on a membership-upgrade action and derives the user to modify from a caller-supplied identifier instead of the current user, allowing any authenticated user such as a subscriber to change another user's WordPress role and membership tier.
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 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
wpeverest user registration & membership是wpeverest公司开源的一个用户注册与会员管理插件。 WordPress user registration & membership 5.2.2之前版本存在授权问题漏洞，该漏洞源于对会员升级操作未执行授权检查，并且从调用者提供的标识符中派生要修改的用户，可能导致任何经过身份验证的用户更改其他用户的WordPress角色和会员等级。
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 ~ 5.2.2 -

II. Public POCs for CVE-2026-11963

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III. Intelligence Information for CVE-2026-11963

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Vendor Advisories for CVE-2026-11963 (1)

Same Patch Batch · Unknown · 2026-07-13 · 11 CVEs total

CVE-2026-12275 Tutor LMS < 3.9.13 - Subscriber+ Unauthorized Course Enrollment and Private Course Content
CVE-2026-12397 WP Job Portal < 2.5.5 - Subscriber+ Employer Email Disclosure via IDOR
CVE-2026-12582 Library Management System < 3.5.8 - Unauthenticated SQL Injection via book_id
CVE-2026-12396 WP Job Portal < 2.5.5 - Subscriber+ Arbitrary Job Approval, Featuring and Rejection
CVE-2026-11964 User Registration & Membership < 5.2.2 - Unauthenticated PayPal Webhook Signature Verifica
CVE-2026-12081 Database for Contact Form 7, WPforms, Elementor forms < 1.5.2 - Unauthenticated PHP Object
CVE-2026-12273 Tutor LMS < 3.9.13 - Subscriber+ Arbitrary Auto-Approved Comment Creation
CVE-2026-12271 Tutor LMS < 3.9.13 - Subscriber+ Arbitrary Quiz Attempt Modification via IDOR
CVE-2026-12274 Tutor LMS < 3.9.13 - Instructor+ Arbitrary Post Overwrite via IDOR
CVE-2026-10551 Breeze Cache < 2.5.6 - Unauthenticated Stored XSS via Minify Library

IV. Related Vulnerabilities

Same product: User Registration & Membership
Same vendor: Unknown

V. Comments for CVE-2026-11963

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