CVE-2021-29993
Medium
Elevated severity or exploit probability.
CVSS base
8.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
EPSS — probability of exploitation (30 days)
0.7%
52.2th percentile
CISA KEV
Not listed
Weakness / dates
—
Published 2021-11-03 · modified 2026-08-19
Description
Firefox for Android allowed navigations through the `intent://` protocol, which could be used to cause crashes and UI spoofs. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 92.
Affected
References
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1712242%2C1708767%2C1712240%2C1708544%2C1729259
- https://www.mozilla.org/security/advisories/mfsa2021-38/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1712242%2C1708767%2C1712240%2C1708544%2C1729259
- https://www.mozilla.org/security/advisories/mfsa2021-38/