6.5

CVE-2023-1945: mozilla firefox_esr Out-of-bounds Write

CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2023-1945DEBIAN-CVE-2023-1945
Published 02-06-2023Last modified 09-01-2025
Open JSON

Vulnerability summary

CVE-2023-1945 is a medium (CVSS 6.5) Out-of-bounds Write vulnerability in mozilla firefox_esr. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 49.8% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.64%
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 28 · Related 6
DLA-3391-1DLA-3400-1DSA-5385-1DSA-5392-1MGASA-2023-0146MGASA-2023-0147

Timeline

  1. 02-06-2023
    PublishedVulnerability first disclosed.
  2. 09-01-2025
    Last modifiedVulnerability information updated.

Description

Unexpected data returned from the Safe Browsing API could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 102.10 and Firefox ESR < 102.10.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.64%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

0.00 pp

From 0.64% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.64%

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

Debian2 products
  • firefox-esr< 102.10.0esr-1
  • thunderbird< 1:102.10.0-1
Mozilla2 products
Ubuntu1 product
  • thunderbird< 1:102.10.0+build2-0ubuntu0.18.04.1 | < 1:102.10.0+build2-0ubuntu0.20.04.1 | < 1:102.10.0+build2-0ubuntu0.22.04.1

3 vendors · 5 products

References

9 links