Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A flaw was found in Epiphany's form autofill feature. The EphyAutofill.isVisible() function only checks an element's on-screen size and does not detect fields hidden via CSS properties such as display:none, visibility:hidden, or opacity:0. A malicious web page can include hidden form fields that are silently populated with sensitive data (personal information, credit card numbers) when the user triggers autofill. The hidden field values can then be exfiltrated via JavaScript.

This is particularly impactful in Epiphany because credit card information is autofilled directly without requiring CVV confirmation, unlike other browsers.

Upstream issue: https://gitlab.gnome.org/GNOME/epiphany/-/work_items/2951