CVE-2021-29983

MEDIUM

Firefox < 91.0 - Denial of Service via Fullscreen Mode

Title source: llm
STIX 2.1

Description

Firefox for Android could get stuck in fullscreen mode and not exit it even after normal interactions that should cause it to exit. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 91.

References (2)

Core 2
Core References
Issue Tracking, Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1719088

Scores

CVSS v3 6.5
EPSS 0.0029
EPSS Percentile 52.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Details

Status published
Products (1)
mozilla/firefox < 91.0
Published Aug 17, 2021
Tracked Since Feb 18, 2026