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CVE-2026-18547— Ultimate Member <= 2.12.1 存储型跨站脚本漏洞

一分钟漏洞结论

影响对象
ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

WordPress 插件 Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership 中存在存储型跨站脚本漏洞（Stored Cross-Site Scripting, XSS），影响范围为所有 2.12.1 及更早版本。该漏洞源于对输入内容的消毒（sanitization）和输出内容的转义（escaping）处理不足。攻击者只要具备订阅者（subscriber）或更高

CVSS 6.4 · Medium
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一、 漏洞 CVE-2026-18547 基础信息

漏洞信息
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Vulnerability Title
Ultimate Member <= 2.12.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Textarea Profile Field with HTML Support (DOM Gadget via id Attribute)
来源: CVE Program / CVE List V5
Vulnerability Description
The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Textarea Profile Field with HTML Support (DOM Gadget via id Attribute) in all versions up to, and including, 2.12.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is possible because the wp_kses 'templates' allowlist permits the id attribute on div elements but does not neutralize unescaped quotes within its value; when pickadate.js concatenates the stored id value into an HTML string via jQuery .html() on profile page load, the smuggled onfocus and autofocus attribute syntax breaks out of attribute context and executes as JavaScript.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
来源: 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)
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin 0 ~ 2.12.1 -

二、漏洞 CVE-2026-18547 的公开POC

# POC 描述 源链接 神龙链接
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三、漏洞 CVE-2026-18547 的情报信息

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CVE-2026-18547 补丁与修复 (3)

CVE-2026-18547 厂商安全公告 (1)

IV. Related Vulnerabilities

Same product: Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Same vendor: ultimatemember
Same weakness: CWE-79

V. Comments for CVE-2026-18547

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