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CVE-2026-120070— User Frontend <= 4.3.13 - Authenticated (Subscriber+) Privilege Escalation via post_content 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 及之前的所有版本中存在权限提升漏洞。该漏洞源于函数中的参数处理逻辑：受保护的短代码黑名单防护机制检查的是经处理后的副本，而实际持久化到数据库的副本则经过处理；其中步骤会剥离 C0 控制字节，使得攻击者能够在

CVSS 8.8 · High EPSS 0.30% · P23 Updated Nov 01, 2026

Possible ATT&CK Techniques 3 AI

T1203 · Exploitation for Client Execution T1552 · Unsecured Credentials T1068 · Exploitation for Privilege Escalation

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 - Authenticated (Subscriber+) Privilege Escalation via post_content 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 Privilege Escalation in all versions up to, and including, 4.3.13 via the `post_content` parameter of the `submit_post()` function. The vulnerability exists because the protected-shortcode blocklist guard inspects the `sanitize_textarea_field()` copy of the submitted `post_content`, while the copy actually persisted to the database is processed through `wp_kses()`, whose `wp_kses_no_null()` step strips C0 control bytes — allowing an attacker to inject a single `\x01` byte inside the `[wpuf-registration]` tag name to defeat the `strpos()` blocklist check while the clean, functional shortcode is stored verbatim; `strip_shortcodes()` does not neutralize the stored shortcode either, because the Frontend container that registers it via `add_shortcode()` is only instantiated when `is_admin()` is false, and `admin-ajax` requests have `is_admin() === true`. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject a `[wpuf-registration role="editor"]` shortcode into a published post, causing a live Editor-role registration form to be rendered publicly on the frontend that any visitor — or the attacker themselves — can submit to mint a WordPress Editor account with an immediately active privileged session when the default `autologin_after_registration` setting is enabled.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

特权管理不恰当

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-2026-120070

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III. Intelligence Information for CVE-2026-120070

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Other References for CVE-2026-120070 (6)

https://www.cve.org/CVERecord?id=CVE-2026-120070

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-2026-103962	6.1 MEDIUM	User Frontend <= 4.3.13 - Reflected Cross-Site Scripting via 'field_attr[required]' Parame

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-269