CVE-2021-23984 – Mozilla: Malicious extensions could have spoofed popup information

https://notcve.org/view.php?id=CVE-2021-23984

A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9. Una extensión maliciosa podría haber abierto una ventana emergente sin una barra de direcciones. • https://bugzilla.mozilla.org/show_bug.cgi?id=1693664 https://www.mozilla.org/security/advisories/mfsa2021-10 https://www.mozilla.org/security/advisories/mfsa2021-11 https://www.mozilla.org/security/advisories/mfsa2021-12 https://access.redhat.com/security/cve/CVE-2021-23984 https://bugzilla.redhat.com/show_bug.cgi?id=1942786 • CWE-290: Authentication Bypass by Spoofing CWE-1021: Improper Restriction of Rendered UI Layers or Frames •