CVE Catalog

CVE-2026-42207

MediumCVSS 6.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.15%

4th percentile - higher than 4% of all known CVEs

Summary

Magento Long Term Support (LTS) before 20.18.0 contains an open redirect vulnerability in Mage_ProductAlert_AddController::stockAction(), which reads the uenc query parameter and passes it directly to $this->_redirectUrl($backUrl) without calling $this->_isUrlInternal(). When the supplied product_id does not match any catalog product, the server issues an unvalidated HTTP 302 redirect to whatever URL was provided as uenc.

Risk Assessment

An attacker can abuse the trusted store domain to redirect users to malicious sites, facilitating phishing and fraud. The risk affects stores running Magento LTS.

Recommendation

Update Magento LTS to version 20.18.0 or later. Until patched, monitor for unusual redirects from ProductAlert endpoints.

Related vulnerabilities

Original NVD description (English source)

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, Mage_ProductAlert_AddController::stockAction() reads the uenc query parameter and passes it directly to $this->_redirectUrl($backUrl) without calling $this->_isUrlInternal(). When the supplied product_id does not match any catalog product, the server issues an unvalidated HTTP 302 redirect to whatever URL was provided as uenc. This vulnerability is fixed in 20.18.0.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS