CVE-2021-29973

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-08-05 · updated 2026-06-17

Description

Password autofill was enabled without user interaction on insecure websites on Firefox for Android. This was corrected to require user interaction with the page before a user's password would be entered by the browser's autofill functionality *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 90.

Affected products

Mozilla Firefox: before 90.0 — fixed in 90.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 90.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1701932
https://www.mozilla.org/security/advisories/mfsa2021-28/
https://bugzilla.mozilla.org/show_bug.cgi?id=1701932
https://www.mozilla.org/security/advisories/mfsa2021-28/

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