A malicious website that causes an HTTP Authentication dialog to be spawned could trick the built-in password manager to suggest passwords for the currently active website instead of the website that triggered the dialog. This bug only affects Firefox for Android. Other operating systems are unaffected.. This vulnerability affects Firefox < 89.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-29965
• https://bugzilla.mozilla.org/show_bug.cgi?id=1709257
• https://www.mozilla.org/security/advisories/mfsa2021-23/