When opening appref-ms files, Firefox did not warn the user that these files may contain malicious code. *This bug only affects Firefox on Windows. Other operating systems are unaffected.* External Reference: https://www.mozilla.org/en-US/security/advisories/mfsa2023-30/#CVE-2023-4054
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2023-4054