CVE-2023-6873

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.85% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 57.8% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2023-12-19 13:38Z2 YR AGO

Last updated

2025-02-13 17:26Z1 YR AGO

Reserved

2023-12-15

Assigning CNA

mozilla

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

c09c2202c9f6d885add491b736f2e6b89d28be269c93b0ac9668ca0e54205c31

• bugzilla.mozilla.orgMemory safety bugs fixed in Firefox 121https://bugzilla.mozilla.org/buglist.cgi?bug_id=1855327%2C1862089%2C1862723
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2023-56/
• www.debian.orghttps://www.debian.org/security/2023/dsa-5582
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/12/msg00021.html
• security.gentoo.orghttps://security.gentoo.org/glsa/202401-10