What is CVE-2020-6815?

CVE-2020-6815 is a critical-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-03-25.

How severe is CVE-2020-6815?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2020-6815 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Mozilla Firefox

CVE-2020-6815

Mozilla developers reported memory safety and script safety bugs present in Firefox 73. Some of these bugs showed evidence of memory corruption or escalation of privilege and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 74.

Vulnerability class: Buffer Overflow

EPSS: 0.013 (68.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mozilla Firefox — versions unspecified

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

security@mozilla.org (x_refsource_MISC, Vendor Advisory)
security@mozilla.org (Permissions Required, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-6815?: CVE-2020-6815 is a critical-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-03-25.
How severe is CVE-2020-6815?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2020-6815 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.