7.5

CVE-2024-9394: mozilla firefox Cross-site Scripting

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2024-9394DEBIAN-CVE-2024-9394CGA-226j-p82x-562j
Published 01-10-2024Last modified 03-11-2025
Open JSON

Vulnerability summary

CVE-2024-9394 is a high (CVSS 7.5) Cross-site Scripting vulnerability in mozilla firefox. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 43% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.52%
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 32 · Related 12
DLA-3913-1DLA-3916-1DSA-5783-1DSA-5789-1MGASA-2024-0334OPENSUSE-SU-2024:14385-1

Timeline

  1. 01-10-2024
    PublishedVulnerability first disclosed.
  2. 03-11-2025
    Last modifiedVulnerability information updated.

Description

An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the `resource://devtools` origin. This could allow them to access cross-origin JSON content. This access is limited to "same site" documents by the Site Isolation feature on desktop clients, but full cross-origin access is possible on Android versions. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Firefox ESR < 115.16, Thunderbird < 128.3, and Thunderbird < 131.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

0.00 pp

From 0.52% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.52%

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

Ubuntu9 products
  • firefox< 131.0+build1.1-0ubuntu0.20.04.1
  • mozjs102All versions (No fix recorded)
  • mozjs115All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
Mozilla3 products
  • firefox≥ unspecified, < 131 | < 131.0
  • firefox_esr≥ unspecified, < 128.3 | ≥ unspecified, < 115.16 | < 115.16.0 | ≥ 116.0, < 128.3.0
  • thunderbird≥ unspecified, < 128.3 | ≥ unspecified, < 131 | < 128.3 | 129.0:beta | 129.0:beta2 | 129.0:beta3 | 129.0:beta4 | 129.0:beta5 | 129.0:beta6
Chainguard2 products
  • firefox< 136.0.2-r0
  • firefox-esr< 128.3.0-r0
Debian2 products
  • firefox-esr< 128.3.0esr-1~deb12u1 | < 128.3.0esr-1
  • thunderbird< 1:115.16.0esr-1~deb12u1 | < 1:128.3.0esr-1
Wolfi1 product
  • firefox< 136.0.2-r0

5 vendors · 17 products

References

15 links
Show all 15 references