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CVE-2026-46721— Broken Access Control in extension "Frontend User Registration" (sf_register)

Quick assessment

Affected
TYPO3 Extension "Frontend 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.

TYPO3 Extension Frontend User Registration是TYPO3开源的一个TYPO3前台用户注册扩展。 TYPO3 Extension Frontend User Registration存在安全漏洞，该漏洞源于创建和编辑流程未限制用户属性提交且未对前端用户组分配实施访问控制，可能导致攻击者将任意前端用户组分配给新注册或编辑的账户，从而未经授权访问受限制的内容和功能。

AI Predicted 8.1 Difficulty: Easy EPSS 0.44% · P36

Affected Version Matrix 2

VendorProduct Version RangeStatus
TYPO3 Extension "Frontend User Registration" 14.0.0< 14.0.2 affected
< 13.2.4 affected
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I. Basic Information for CVE-2026-46721

Vulnerability Information
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Vulnerability Title
Broken Access Control in extension "Frontend User Registration" (sf_register)
Source: CVE Program / CVE List V5
Vulnerability Description
The create and edit flows do not restrict which user properties may be submitted and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited account, gaining unauthorized access to content and functionality restricted to privileged frontend user groups.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-915
Source: CVE Program / CVE List V5
Vulnerability Title
TYPO3 Extension Frontend User Registration 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TYPO3 Extension Frontend User Registration是TYPO3开源的一个TYPO3前台用户注册扩展。 TYPO3 Extension Frontend User Registration存在安全漏洞，该漏洞源于创建和编辑流程未限制用户属性提交且未对前端用户组分配实施访问控制，可能导致攻击者将任意前端用户组分配给新注册或编辑的账户，从而未经授权访问受限制的内容和功能。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TYPO3 Extension "Frontend User Registration" 14.0.0 ~ 14.0.2 -

II. Public POCs for CVE-2026-46721

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III. Intelligence Information for CVE-2026-46721

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Vendor Advisories for CVE-2026-46721 (1)

Same Patch Batch · TYPO3 · 2026-05-19 · 8 CVEs total

CVE-2026-46722 XML External Entity Injection in extension "Faceted Search" (ke_search)
CVE-2026-46725 Remote Code Execution in extension "Content Element Selector" (ceselector)
CVE-2026-46723 Information Disclosure in extension "Faceted Search" (ke_search)
CVE-2026-46724 Path Traversal in extension "Faceted Search" (ke_search)
CVE-2026-8726 SQL Injection in extension "News system" (news)
CVE-2026-8727 Remote Code Execution in extension "Site Crawler" (crawler)
CVE-2026-8827 SQL Injection in extension "Address List" (tt_address)

IV. Related Vulnerabilities

Same vendor: TYPO3
Same weakness: CWE-915

V. Comments for CVE-2026-46721

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