Description
Mozilla developers and community members reported memory safety bugs present in Firefox 90. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 91.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2021-33/
Broken Link, Issue Tracking, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1544190%2C1716481%2C1717778%2C1719319%2C1722073
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202202-03
Scores
CVSS v3
8.8
EPSS
0.0044
EPSS Percentile
63.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Details
CWE
CWE-787
Status
published
Products (1)
mozilla/firefox
< 91.0
Published
Aug 17, 2021
Tracked Since
Feb 18, 2026