What is CVE-2023-6213?

CVE-2023-6213 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2023-11-21.

How severe is CVE-2023-6213?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Mozilla Firefox

CVE-2023-6213

Memory safety bugs present in Firefox 119. 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 < 120.

Vulnerability class: Buffer Overflow

EPSS: 0.007 (48.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Mozilla Firefox — versions unspecified

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

security@mozilla.org (Broken Link)
security@mozilla.org (Release Notes, Vendor Advisory)
security@mozilla.org

Frequently asked questions

What is CVE-2023-6213?: CVE-2023-6213 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2023-11-21.
How severe is CVE-2023-6213?: High severity. CVSS v3 base score is 8.8 out of 10.