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CVE-2024-4367

PDF.js vulnerable to arbitrary JavaScript execution upon opening a malicious PDF

Description

### Impact
If pdf.js is used to load a malicious PDF, and PDF.js is configured with `isEvalSupported` set to `true` (which is the default value), unrestricted attacker-controlled JavaScript will be executed in the context of the hosting domain.


### Patches
The patch removes the use of `eval`:
https://github.com/mozilla/pdf.js/pull/18015

### Workarounds
Set the option `isEvalSupported` to `false`.

### References
https://bugzilla.mozilla.org/show_bug.cgi?id=1893645

Patch Available

Fix available through Seal Security. No upgrade required, protect your application instantly.

Fix without upgrading
Vulnerability Details
Score
8.7
Score Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected Versions
pdfjs-dist < 4.2.67
Severity
High
High
High
Ecosystem
JavaScript
Publish Date
May 7, 2024
Modified Date
April 24, 2025