CVE-2026-42207 Magento LTS: Open Redirect via Unvalidated `uenc` Parameter in `stockAction()` - magento-lts

Magento Long Term Support LTS is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to 20.18.0, MageProductAlertAddController::stockAction reads the uenc query parameter and passes...

Magento LTS Vulnerable to Open Redirect via Unvalidated `uenc` Parameter in `stockAction()`

Summary MageProductAlertAddController::stockAction reads the uenc query parameter and passes it directly to $this-redirectUrl$backUrl without calling $this-isUrlInternal When the supplied productid does not match any catalog product, the server issues an unvalidated HTTP 302 redirect to whatever...