CVE-2024-4367

Exp

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.

Published: 2024-05-14 Last update: 2026-05-12 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-4367 is rated High Exploit Risk (86.3/100): CVSS High severity, with high exploitation likelihood (EPSS 40.32%, 97th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.98% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2024-4367

EDB-ID Source Kind Published Link
52273 exploit_db edb 2025-04-22 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-4367

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-02 38.34% 40.32% +1.98%
2 2026-05-16 37.76% 38.34% +0.58%
3 2026-05-12 — 37.76% —

Full EPSS history (79 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-4367

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
5.6 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.2 3.4 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-4367

GitHub Security Advisory for CVE-2024-4367

GHSA-wgrm-67xf-hhpq · Severity: high · Ecosystem: npm — PDF.js vulnerable to arbitrary JavaScript execution upon opening a malicious PDF

OS Trackers for CVE-2024-4367

vendor priority summary link
alpine — CVE-2024-4367: 3 source package rows (firefox, firefox-esr, thunderbird); 293 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 293. https://security.alpinelinux.org/vuln/CVE-2024-4367
debian not yet assigned CVE-2024-4367 not yet assigned priority: Debian including 4 source packages (firefox, firefox-esr, odoo, thunderbird), 13 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 13. https://security-tracker.debian.org/tracker/CVE-2024-4367
redhat high — https://access.redhat.com/security/cve/CVE-2024-4367
suse high CVE-2024-4367 severity important: SUSE including 36 source package names (MozillaFirefox-115.11.0-112.212.1, MozillaFirefox-115.11.0-150200.152.137.2, …), 152 product×package rows across 53 product lines (Container suse/kiosk/firefox-esr, Image SLES12-SP5-SAP-Azure-LI-BYOS-Production, … (53 product lines)): Fixed 152. https://www.suse.com/security/cve/CVE-2024-4367/
ubuntu medium CVE-2024-4367 medium priority: Ubuntu including 8 source packages (firefox, mozjs102, …), 42 status rows across 6 suites (bionic, focal, jammy, mantic, noble, upstream): DNE 17, ignored 15, released 5, not-affected 4, needs-triage 1. https://ubuntu.com/security/CVE-2024-4367

Affected software / configurations for CVE-2024-4367

Vendor Product Version Raw CPE
mozilla firefox < 115.11.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
mozilla firefox < 126.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
mozilla thunderbird < 115.11.0 cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend < 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:*:*:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:-:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision10:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision11:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision12:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision13:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision14:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision15:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision16:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision17:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision18:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision19:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision20:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision21:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision22:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision23:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision24:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision25:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision26:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision27:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision28:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision29:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision3:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision30:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision31:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision32:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision33:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision34:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision35:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision36:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision37:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision38:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision39:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision4:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision40:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision41:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision42:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision43:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision44:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision5:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision6:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision7:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision8:*:*:*:*:*:*
open-xchange open-xchange_appsuite_frontend 7.10.6 cpe:2.3:a:open-xchange:open-xchange_appsuite_frontend:7.10.6:revision9:*:*:*:*:*:*

References for CVE-2024-4367

URL Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1893645 Issue Tracking
https://lists.debian.org/debian-lts-announce/2024/05/msg00010.html Mailing List
https://lists.debian.org/debian-lts-announce/2024/05/msg00012.html Mailing 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/30 Mailing List
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://www.exploit-db.com/exploits/52273
https://cert-portal.siemens.com/productcert/html/ssa-827383.html
cvelogic Threat Intelligence