OpenMage magento-lts up to 20.18.1/20.x Admin Controllers _isAllowed improper authorization

Summaryinfo

A vulnerability classified as problematic was found in OpenMage magento-lts up to 20.18.1/20.x. Affected by this issue is the function _isAllowed of the component Admin Controllers. Executing a manipulation can lead to improper authorization. The identification of this vulnerability is CVE-2026-128031. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in OpenMage magento-lts up to 20.18.1/20.x and classified as problematic. This vulnerability affects the function _isAllowed of the component Admin Controllers. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

OpenMage magento-lts before 20.18.2 and 21.0.0-beta1 before 21.0.0-beta3 contains an incorrect authorization vulnerability because admin controllers' _isAllowed() checks fall back to, or only check, parent ACL resources instead of finer per-action permissions. Authenticated restricted administrators can mass cancel or hold orders, rewrite order shipping addresses, export customer report data, or create REST roles despite their role denying those permissions.

The advisory is available at github.com. This vulnerability was named CVE-2026-128031 since 11/12/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are needed for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/13/2026). This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• E-Commerce Management Software

Vendor

• OpenMage

Name

• magento-lts

Version

• 20.18.0
• 20.18.1
• 20.x

Website

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

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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