cve.bz

CVE-2021-23999

8.8 highEPSS 1.4%

High (8.8) in mozilla. EPSS 1.4% chance of exploitation in the next 30 days.

If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

Severity

CVSS 3.1

8.8 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
1.4% chance of exploitation in the next 30 days; higher than 71% of CVEs (scores of 2026-10-31)
CWEs
CWE-269, CWE-697
Published
Modified
Record from
the NVD, synced

Affected

References

Check your stackJSON