7.5

CVE-2024-8383: mozilla firefox

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2024-8383DEBIAN-CVE-2024-8383CGA-cv86-fxf6-xr52
Published 03-09-2024Last modified 04-11-2025
Open JSON

Vulnerability summary

CVE-2024-8383 is a high (CVSS 7.5) vulnerability in mozilla firefox. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 49.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · 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 18 · Related 8
DLA-3869-1DLA-3882-1DSA-5765-1DSA-5767-1MGASA-2024-0325MGASA-2024-0332

Timeline

  1. 03-09-2024
    PublishedVulnerability first disclosed.
  2. 04-11-2025
    Last modifiedVulnerability information updated.

Description

Firefox normally asks for confirmation before asking the operating system to find an application to handle a scheme that the browser does not support. It did not ask before doing so for the Usenet-related schemes news: and snews:. Since most operating systems don't have a trusted newsreader installed by default, an unscrupulous program that the user downloaded could register itself as a handler. The website that served the application download could then launch that application at will. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Firefox ESR < 115.15.

CVSS metrics

6 scores · 6 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 20-09-2026

20-09-202620-10-2026
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

Ubuntu8 products
  • firefox< 130.0+build2-0ubuntu0.20.04.1
  • mozjs102All versions (No fix recorded)
  • mozjs115All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
Chainguard2 products
  • firefox< 130.0-r0
  • firefox-esr< 128.2.0-r0
Debian2 products
  • firefox-esr< 115.15.0esr-1~deb12u1 | < 115.15.0esr-1
  • thunderbird< 1:115.15.0-1~deb12u1
Mozilla2 products
  • firefox≥ unspecified, < 130 | < 130.0
  • firefox_esr≥ unspecified, < 128.2 | ≥ unspecified, < 115.15 | < 115.15 | ≥ 128.0, < 128.2
Wolfi1 product
  • firefox< 130.0-r0

5 vendors · 15 products

References

12 links
Show all 12 references