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CVE-2026-120840— WordPress User Registration plugin <= 5.3.0 - Broken Access Control vulnerability

Quick assessment

Affected
ThemeGrill User Registration
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.

ThemeGrill 的 User Registration 插件存在“缺少授权”漏洞，该漏洞允许攻击者利用访问控制安全级别配置不当的问题进行攻击。此问题影响 User Registration 插件从未知版本至 5.3.0 的所有版本。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-120840

Vulnerability Information
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Vulnerability Title
WordPress User Registration plugin <= 5.3.0 - Broken Access Control vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Missing Authorization vulnerability in ThemeGrill User Registration user-registration allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects User Registration: from n/a through 5.3.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ThemeGrill User Registration 0 ~ 5.3.0 -

II. Public POCs for CVE-2026-120840

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-120840

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Other References for CVE-2026-120840 (1)

IV. Related Vulnerabilities

Same product: User Registration
Same vendor: ThemeGrill
Same weakness: CWE-862