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GHSA-5pxh-89cx-4668

Magento LTS vulnerable to stored XSS in theme config fields

Source: GitHub Advisory Database (reviewed) Low CVE-2025-27400

Packages

EcosystemPackageAffectedFixed in
Packagist openmage/magento-lts < 20.12.3 20.12.3

Details

As written in the advisory (Markdown source, shown as plain text).

As reported by [Aakash Adhikari](https://hackerone.com/dark_haxor), Github: @justlife4x4, the Design > Themes > Skin (Images / CSS) config field allows a Stored XSS when it contains an end script tag. ### Impact A malicious user with access to this configuration field could use a Stored XSS to affect other authenticated admin users in the admin panel. The attack requires an admin user with configuration access, so in practice, it is not very likely to be used for gaining elevated privileges, although it could theoretically be used to impersonate other users. ![image](https://github.com/user-attachments/assets/fd5b8f31-bf0c-4e87-8b50-03c6c8428bed)

References

External links from the advisory. They lead to third-party sites.