Vulnerability in Mozilla Firefox

CVE-2024-4367

A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.

EPSS: 0.403 (97.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2024-4367?
CVE-2024-4367 is a high-severity vulnerability in Mozilla Firefox, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 8.8/10. Published 2024-05-14.
How severe is CVE-2024-4367?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2024-4367 known to be exploited?
52 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.