OpenMage Magento-Lts up to 20.18.1/21.0.0-beta1/21.0.0-beta2 File Custom Options Mage_Catalog_Model_Product_Option_Type_File cross site scripting

Summaryinfo

A vulnerability was found in OpenMage Magento-Lts up to 20.18.1/21.0.0-beta1/21.0.0-beta2. It has been declared as problematic. Affected is the function Mage_Catalog_Model_Product_Option_Type_File of the component File Custom Options. The manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2026-128028. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenMage Magento-Lts up to 20.18.1/21.0.0-beta1/21.0.0-beta2. It has been classified as problematic. Affected is the function Mage_Catalog_Model_Product_Option_Type_File of the component File Custom Options. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

OpenMage magento-lts before 20.18.2 and 21.0.0-beta1 before 21.0.0-beta3 contains a stored cross-site scripting vulnerability in Mage_Catalog_Model_Product_Option_Type_File, which accepts guest SVG, XHTML, or XML uploads through product File custom options with an empty allowed-extension list. Unauthenticated attackers can send the file URL under media/custom_options/ to victims, executing script in the store origin and exposing administrator sessions when the admin panel shares that origin.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-128028 since 11/12/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 20.18.2 or 21.0.0-beta3 eliminates this vulnerability.

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Productinfo

Type

• E-Commerce Management Software

Vendor

• OpenMage

Name

• Magento-Lts

Version

• 20.18.0
• 20.18.1
• 21.0.0-beta1
• 21.0.0-beta2

Website

• Product: https://github.com/OpenMage/magento-lts/

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