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CVE-2026-95866— User Profile Builder <= 4.0.2 - Unauthenticated Stored Cross-Site Scripting via Avatar Field

Quick assessment

Affected
cozmoslabs User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor
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 Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor” 在 4.0.2 及更早版本中，由于输入 sanitization（清理）和输出转义（escaping）不足，存在存储型跨站脚本漏洞（Stored Cross-Site Scripting, XSS），该漏洞存在于头像字段中。攻击者无需身份验证即可在页面中注入任意 Web 脚本，当用户访问被注入的页面时，这些

CVSS 7.2 · High EPSS 0.26% · P15

Affected Version Matrix 1

VendorProduct Version RangeStatus
cozmoslabs User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor ≤ 4.0.2 affected
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I. Basic Information for CVE-2026-95866

Vulnerability Information
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Vulnerability Title
User Profile Builder <= 4.0.2 - Unauthenticated Stored Cross-Site Scripting via Avatar Field
Source: CVE Program / CVE List V5
Vulnerability Description
The User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Avatar Field in all versions up to, and including, 4.0.2 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 zero-length multipart file branch in wppb_save_avatar_value() writes the raw request value directly to user meta, bypassing the wppb_save_attachment_id()/wppb_verify_attachment_id() validation path; the stored payload is later adopted as a WordPress attachment URL and rendered unescaped by wppb_default_fields_make_upload_button() when an administrator views the affected account.
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
cozmoslabs User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor 0 ~ 4.0.2 -

II. Public POCs for CVE-2026-95866

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III. Intelligence Information for CVE-2026-95866

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Patches & Fixes for CVE-2026-95866 (3)

Vendor Advisories for CVE-2026-95866 (1)

IV. Related Vulnerabilities

Same product: User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor
Same vendor: cozmoslabs
Same weakness: CWE-79

V. Comments for CVE-2026-95866

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