---
id: CVE-2026-120333
title: Broken Access Control in extension "Frontend User Registration" (sf_register)
summary: >-
  The actions linked in the emails of the extension (e.g. to confirm a
  registration or the deletion of an account) do not reject requests with a
  missing or invalid hash. Instead, the frontend user given in the request is
  used. Unauthentica…
severity: high
cvss: 8.8
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-639
vendor: TYPO3
product: evoweb/sf-register
affected:
  - evoweb/sf-register >= 14.0.0 < 14.0.3
  - evoweb/sf-register < 13.2.5
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-03T18:18:10.346463Z'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T18:18:20.354Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120333'
references:
  - url: 'https://typo3.org/security/advisory/typo3-ext-sa-2026-038'
tags:
  - cve.org
epss: 0.00387
epssPercentile: 0.3294
ingestedAt: '2026-11-05T20:33:06.343Z'
---

## Overview

The actions linked in the emails of the extension (e.g. to confirm a registration or the deletion of an account) do not reject requests with a missing or invalid hash. Instead, the frontend user given in the request is used. Unauthenticated attackers can therefore perform these actions for arbitrary active frontend users. This allows them to retrieve the email address or username of all frontend users and to delete arbitrary frontend user accounts.

## Affected

- `evoweb/sf-register >= 14.0.0 < 14.0.3`
- `evoweb/sf-register < 13.2.5`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.