Vulnerability Note VU#714496

Mozilla products allow execution of arbitrary JavaScript

Original Release date: 08 Nov 2006 | Last revised: 21 Dec 2006


Multiple Mozilla products allow running JavaScript to be recompiled while executing. This vulnerability may allow a remote attacker to execute arbitrary JavaScript bytecode.


According to Mozilla Foundation Security Advisory 2006-67: was possible to modify a Script object while it was executing, potentially leading to the execution of arbitrary JavaScript bytecode.

This vulnerability requires JavaScript to be enabled. JavaScript is enabled by default in the Firefox web browser, but not in the Mozilla Thunderbird email client.

Note that this issue affects Mozilla Firefox, Thunderbird, and SeaMonkey. For more information refer to Mozilla Foundation Security Advisory 2006-67.


A remote, unauthenticated attacker may be able to execute arbitrary JavaScript bytecode.


Apply an update
According to the Mozilla Foundation Security Update 2006-67, this vulnerability is addressed in Firefox, Thunderbird, and SeaMonkey 1.0.6.

Disable JavaScript

For instructions on how to disable JavaScript in Firefox, please refer to the Firefox section of the Securing Your Web Browser document.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
MozillaAffected-08 Nov 2006
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



This vulnerability was reported in Mozilla Foundation Security Advisory 2006-67. Mozilla credits shutdown for providing information concerning this issue.

This document was written by Chris Taschner.

Other Information

  • CVE IDs: CVE-2006-5463
  • Date Public: 08 Nov 2006
  • Date First Published: 08 Nov 2006
  • Date Last Updated: 21 Dec 2006
  • Severity Metric: 14.04
  • Document Revision: 24


If you have feedback, comments, or additional information about this vulnerability, please send us email.