6.5

CVE-2024-9391: mozilla firefox Authentication Bypass by Spoofing

CVSS: 6.5v3.1MediumAnalyzed
AliasesCGA-2633-25jc-gxq8CGA-4m7q-4j2q-mf2xCGA-h636-5384-m9mm
Published 01-10-2024Last modified 22-11-2024
Open JSON

Vulnerability summary

CVE-2024-9391 is a medium (CVSS 6.5) Authentication Bypass by Spoofing vulnerability in mozilla firefox. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 19.3% 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
0.28%
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 2 · Related 5
OPENSUSE-SU-2024:14385-1OPENSUSE-SU-2026:11373-1CGA-6QF4-569P-77V2CGA-HHMQ-QC7M-H29JUBUNTU-CVE-2024-9391

Timeline

  1. 01-10-2024
    PublishedVulnerability first disclosed.
  2. 22-11-2024
    Last modifiedVulnerability information updated.

Description

A user who enables full-screen mode on a specially crafted web page could potentially be prevented from exiting full screen mode. This may allow spoofing of other sites as the address bar is no longer visible. *This bug only affects Firefox Focus for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 131.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

0.00 pp

From 0.28% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.28%

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

Chainguard2 products
  • firefox< 136.0.2-r0
  • firefox-esr< 131-r0
Mozilla1 product
  • firefox≥ unspecified, < 131 | < 131.0
Wolfi1 product
  • firefox< 136.0.2-r0

3 vendors · 4 products

References

2 links