CVE-2026-120333

High

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.

SeverityHigh

CVSS8.8

Exploit probability—

Product

Extension "Frontend User Registration"

PublishedNov 3, 2026

First seenNov 4, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Update

TYPO3 Extension "Frontend User Registration"14.0.3, 13.2.5 or later

Vendor advisories

typo3.org/security/advisory/typo3-ext-sa-2026-038

Affected products

Product	Affected versions	Fixed in
TYPO3 Extension "Frontend User Registration"	14.0.0 ≤ v < 14.0.3, v < 13.2.5	14.0.3, 13.2.5

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