8.8

CVE-2023-4584: mozilla firefox Out-of-bounds Write

CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2023-4584DEBIAN-CVE-2023-4584CGA-62gj-8rj5-w76g
Published 11-09-2023Last modified 18-12-2025
Open JSON

Vulnerability summary

CVE-2023-4584 is a high (CVSS 8.8) Out-of-bounds Write vulnerability in mozilla firefox. EPSS estimates a 0.80% chance of exploitation in the next 30 days, higher than 55.9% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
0.80%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 29 · Related 10
DLA-3553-1DLA-3554-1DSA-5485-1DSA-5488-1MGASA-2023-0266OPENSUSE-SU-2024:13176-1

Timeline

  1. 11-09-2023
    PublishedVulnerability first disclosed.
  2. 18-12-2025
    Last modifiedVulnerability information updated.

Description

Memory safety bugs present in Firefox 116, Firefox ESR 102.14, Firefox ESR 115.1, Thunderbird 102.14, and Thunderbird 115.1. 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 < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.80%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

0.00 pp

From 0.80% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.80%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu8 products
  • firefox< 117.0+build2-0ubuntu0.20.04.1
  • mozjs102All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
Mozilla3 products
  • firefox≥ unspecified, < 117 | < 117.0 | ≥ 115.0, < 115.2
  • firefox_esr≥ unspecified, < 102.15 | ≥ unspecified, < 115.2 | < 102.15
  • thunderbird≥ unspecified, < 102.15 | ≥ unspecified, < 115.2 | < 115.2
Debian2 products
  • firefox-esr< 102.15.0esr-1~deb12u1 | < 115.2.0esr-1
  • thunderbird< 1:102.15.0-1~deb12u1 | < 1:115.2.0-1
Chainguard1 product
  • firefox-esr< 117.0-r0

4 vendors · 14 products

References

11 links
Show all 11 references