EPSS
Percentile
71.6%
firefox-esr is vulnerable to privilege escalation. An attacker is able to load a malicious Blob URL through the System Principal and gain additional privileges.
bugzilla.mozilla.org/show_bug.cgi?id=1691153
security-tracker.debian.org/tracker/CVE-2021-23999
www.mozilla.org/security/advisories/mfsa2021-14/
www.mozilla.org/security/advisories/mfsa2021-15/
www.mozilla.org/security/advisories/mfsa2021-16/