CVE-2026-120333

Broken Access Control in extension "Frontend User Registration" (sf_register)

Published Nov 3, 2026 CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Typo3
Typo3 extension "frontend User Registration"
Vendors & Products Typo3
Typo3 extension "frontend User Registration"
Type Values Removed Values Added
Description 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.
Title Broken Access Control in extension "Frontend User Registration" (sf_register)
Weaknesses CWE-639
References
Metrics cvssV4_0

{'score': 8.8, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
TYPO3
Published
Updated
Nov 3, 2026, 6:18 PM
Reserved
Nov 1, 2026, 1:47 PM
Status
Deferred
Published
Nov 3, 2026, 10:17 AM
Modified
Nov 3, 2026, 7:17 PM