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CVE-2026-103962— User Frontend <= 4.3.13 - Reflected Cross-Site Scripting via 'field_attr[required]' Parameter

Quick assessment

Affected

wedevs User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission

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 Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission"在 4.3.13 及之前所有版本中存在反射型跨站脚本（XSS）漏洞。该漏洞源于对参数的输入净化不足以及输出转义缺失。若攻击者能诱使用户执行某些操作（例如点击恶意链接），未认证的攻击者即可在相关页面中注入任意网页脚本并使其执行。此外，针对

CVSS 6.1 · Medium EPSS 0.21% · P12 Updated Nov 01, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
wedevs	User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission	`≤ 4.3.13`	affected

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Vulnerability Information

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Vulnerability Title

User Frontend <= 4.3.13 - Reflected Cross-Site Scripting via 'field_attr[required]' Parameter

Source: CVE Program / CVE List V5

Vulnerability Description

The User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'field_attr[required]' parameter in all versions up to, and including, 4.3.13 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The nonce check on the wpuf_get_child_cat AJAX action is not an effective security barrier because the wpuf_nonce value is publicly localized to every anonymous visitor of any page containing a WPUF shortcode, making it freely harvestable by an unauthenticated attacker.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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
wedevs	User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission	0 ~ 4.3.13	-

II. Public POCs for CVE-2026-103962

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-103962

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Other References for CVE-2026-103962 (6)

https://www.cve.org/CVERecord?id=CVE-2026-103962

Same Patch Batch · wedevs · 2026-10-31 · 3 CVEs total

CVE-2026-116512	9.8 CRITICAL	Project Manager <= 4.1.1 - Unauthenticated Remote Code Execution via 'id' Parameter Functi
CVE-2026-120070	8.8 HIGH	User Frontend <= 4.3.13 - Authenticated (Subscriber+) Privilege Escalation via post_conten

IV. Related Vulnerabilities

Same product: User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission

Same vendor: wedevs

Same weakness: CWE-79