CVE-2024-4367

Name: CVE-2024-4367
Creator: NVD / NIST
Published: 2024-05-14T18:15:12.467+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 72.65%

Last modified Jun 17, 2026

CVE-2024-4367 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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 estimates a 72.65% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

72.65%

99.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-754

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 115.11.0
Mozilla	Firefox	< 126.0
Mozilla	Thunderbird	< 115.11.0
Debian	Debian Linux	10.0
Open-Xchange	Open-Xchange Appsuite Frontend	< 7.10.6
Open-Xchange	Open-Xchange Appsuite Frontend	7.10.6

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1893645Issue Tracking
https://lists.debian.org/debian-lts-announce/2024/05/msg00010.htmlMailing List
https://lists.debian.org/debian-lts-announce/2024/05/msg00012.htmlMailing List
https://www.mozilla.org/security/advisories/mfsa2024-21/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-22/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-23/Vendor Advisory
http://seclists.org/fulldisclosure/2024/Aug/30Mailing List
https://bugzilla.mozilla.org/show_bug.cgi?id=1893645Issue Tracking
https://codeanlabs.com/blog/research/cve-2024-4367-arbitrary-js-execution-in-pdf-js/
https://github.com/gogs/gogs/issues/7928
https://github.com/mozilla/pdf.js/releases/tag/v4.2.67
https://lists.debian.org/debian-lts-announce/2024/05/msg00010.htmlMailing List
https://lists.debian.org/debian-lts-announce/2024/05/msg00012.htmlMailing List
https://www.exploit-db.com/exploits/52273
https://www.mozilla.org/security/advisories/mfsa2024-21/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-22/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-23/Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-827383.html

Timeline

Published: May 14, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-4367?

How severe is CVE-2024-4367?

CVE-2024-4367 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 72.65% probability of exploitation in the next 30 days.

How do I fix CVE-2024-4367?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-4367?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST