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CVE-2026-42663— WordPress Simple Membership plugin <= 4.7.2 - Cross Site Scripting (XSS) vulnerability

Quick assessment

Affected
wp.insider Simple 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.

Simple Membership是wp.insider个人开发者的一个WordPress网站会员管理插件。 wp.insider Simple Membership 4.7.2及之前版本存在跨站脚本漏洞，该漏洞源于容易受到跨站脚本攻击。

CVSS 6.5 · Medium EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
wp.insider Simple Membership n/a≤ 4.7.2 affected
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I. Basic Information for CVE-2026-42663

Vulnerability Information
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Vulnerability Title
WordPress Simple Membership plugin <= 4.7.2 - Cross Site Scripting (XSS) vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Unauthenticated Cross Site Scripting (XSS) in Simple Membership <= 4.7.2 versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
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
Vulnerability Title
wp.insider Simple Membership 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Simple Membership是wp.insider个人开发者的一个WordPress网站会员管理插件。 wp.insider Simple Membership 4.7.2及之前版本存在跨站脚本漏洞，该漏洞源于容易受到跨站脚本攻击。
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
wp.insider Simple Membership n/a ~ 4.7.2 -

II. Public POCs for CVE-2026-42663

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III. Intelligence Information for CVE-2026-42663

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News Coverage for CVE-2026-42663 (1)

Same Patch Batch · wp.insider · 2026-06-15 · 3 CVEs total

CVE-2026-52692 7.5 HIGH WordPress Affiliates Manager plugin <= 2.9.50 - Sensitive Data Exposure vulnerability
CVE-2026-34886 7.5 HIGH WordPress Simple Membership plugin <= 4.7.1 - Broken Access Control vulnerability

IV. Related Vulnerabilities

Same product: Simple Membership
Same vendor: wp.insider
Same weakness: CWE-79

V. Comments for CVE-2026-42663

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