GHSA-x8jv-q8j2-487c Magento LTS: Reflected XSS - Import -> Data Flow (profiles)

• Packagist openmage/magento-lts: < 20.18.0 → fixed in 20.18.0

A reflected XSS vulnerability was found under admin panel -> System -> Import/Export -> Dataflow - Profiles. Steps to produce + Login to the admin panel + Go to the path `System -> Import/Export -> Dataflow - Profiles` + Select profile direction as `Import`. + Click on `Import Customers` + Upload the file. File Link: customer_20260212_204335.csv + Go back to `Run profile`. + Select the uploaded file and Click on `Run in Popup`. + One can see a URL like this ``` https://demo-admin.openmage.org/index.php/admin/system_convert_gui/run/id/6/key/40dbbb2e93f45f0463c57ff733352f4f/files/import-20260215151125-1_customer_20260212_204335.csv/ ``` + One can see the filename getting reflection in HTML tags. + Inject an HTML tag and observe. ``` https://demo-admin.openmage.org/index.php/admin/system_convert_gui/run/id/6/key/40dbbb2e93f45f0463c57ff733352f4f/files/">hacked/ ``` + One can see the tag is getting executed. + Proceed for XSS. ``` https://demo-admin.openmage.org/index.php/admin/system_convert_gui/run/id/6/key/40dbbb2e93f45f0463c57ff733352f4f/files/%3CScRiPt%20%3Eprompt(document.cookie)%3C%2FScRiPt%3E ``` + There is an XSS popup. Impact Cookie stealing, JS deface, many more