CVE-2024-4367 EXPLOIT
8.8
HIGH · CVSS 3.1 · EPSS 70.7% (pctl 99)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 8.8 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| EPSS | 70.66% — more likely to be exploited than 99% of all CVEs |
| Weakness | CWE-754 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2024-05-14 |
| Last modified | 2026-06-17 |
Affected (4)
| Vendor | Product |
|---|---|
| debian | debian linux |
| mozilla | firefox |
| mozilla | thunderbird |
| open-xchange | open-xchange appsuite frontend |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Firefox ESR 115.11 - PDF.js Arbitrary JavaScript execution | 2025-04-22 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1893645
- https://lists.debian.org/debian-lts-announce/2024/05/msg00010.html
- https://lists.debian.org/debian-lts-announce/2024/05/msg00012.html
- https://www.mozilla.org/security/advisories/mfsa2024-21/
- https://www.mozilla.org/security/advisories/mfsa2024-22/
- https://www.mozilla.org/security/advisories/mfsa2024-23/
- http://seclists.org/fulldisclosure/2024/Aug/30
- https://bugzilla.mozilla.org/show_bug.cgi?id=1893645
- 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.html
- https://lists.debian.org/debian-lts-announce/2024/05/msg00012.html
- https://www.exploit-db.com/exploits/52273
- https://www.mozilla.org/security/advisories/mfsa2024-21/
- https://www.mozilla.org/security/advisories/mfsa2024-22/
- https://www.mozilla.org/security/advisories/mfsa2024-23/
- https://cert-portal.siemens.com/productcert/html/ssa-827383.html
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