CVE-2024-41676: Magento LTS vulnerable to stored Cross-site Scripting (XSS) in admin system configs

July 29, 2024

This XSS vulnerability is about the system configs

design/header/welcome
design/header/logo_src
design/header/logo_src_small
design/header/logo_alt

They are intended to enable admins to set a text in the two cases, and to define an image url for the other two cases. But because of previously missing escaping allowed to input arbitrary html and as a consequence also arbitrary JavaScript.

While this is in most usage scenarios not a relevant issue, some people work with more restrictive roles in the backend. Here the ability to inject JavaScript with these settings would be an unintended and unwanted privilege.

References

github.com/OpenMage/magento-lts
github.com/OpenMage/magento-lts/commit/484cf8afc550e98bbf2c03fbb29a8450a32e7948
github.com/OpenMage/magento-lts/security/advisories/GHSA-5vrp-638w-p8m2
github.com/advisories/GHSA-5vrp-638w-p8m2
nvd.nist.gov/vuln/detail/CVE-2024-41676

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