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CVE-2026-96660— User Registration & Membership <= 5.2.8 - Unauthenticated Stored Cross-Site Scripting via Checkbox Field Value

Quick assessment

Affected
wpeverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
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 插件"User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder"在 5.2.8 及以下所有版本中，由于输入清理和输出转义不足，存在通过复选框字段值触发的存储型跨站脚本（Stored XSS）漏洞。该漏洞允许未认证的攻击者在页面中注入任意 Web 脚本，这些脚本

CVSS 7.2 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-96660

Vulnerability Information
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Vulnerability Title
User Registration & Membership <= 5.2.8 - Unauthenticated Stored Cross-Site Scripting via Checkbox Field Value
Source: CVE Program / CVE List V5
Vulnerability Description
The User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Checkbox Field Value in all versions up to, and including, 5.2.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The nopriv AJAX action user_registration_user_form_submit reaches ur_process_registration() without nonce validation, meaning any unauthenticated request can reach the vulnerable code path.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wpeverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder 0 ~ 5.2.8 -

II. Public POCs for CVE-2026-96660

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III. Intelligence Information for CVE-2026-96660

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Other References for CVE-2026-96660 (6)

Same Patch Batch · wpeverest · 2026-10-17 · 3 CVEs total

CVE-2026-92798 8.1 HIGH User Registration & Membership <= 5.2.8 - Authenticated (Subscriber+) Arbitrary Shortcode
CVE-2026-92978 4.3 MEDIUM User Registration & Membership <= 5.2.8 - Cross-Site Request Forgery to trigger_bulk_actio

IV. Related Vulnerabilities

Same product: User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
Same vendor: wpeverest
Same weakness: CWE-79

V. Comments for CVE-2026-96660

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