cve.bz

CVE-2021-23960

8.8 highEPSS 1.3%

High (8.8) in mozilla. EPSS 1.3% chance of exploitation in the next 30 days.

Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.

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
1.3% chance of exploitation in the next 30 days; higher than 70% of CVEs (scores of 2026-10-31)
Published
Modified
Record from
the NVD, synced

Affected

References

Check your stackJSON