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Mozilla XUL web applications may hide the titlebar

Vulnerability Note VU#349217

Original Release Date: 2007-10-19 | Last Revised: 2007-10-19


Mozilla's XUL contains a vulnerability that may allow a web application to cover an active window's titlebar.


XUL is Mozilla's XML-based user interface language. XUL can be used to create Mozilla applications, extensions, and web applications.

From Mozilla Foundation Security Advisory 2007-33:
Mozilla developer Eli Friedman discovered that web pages written in the XUL markup language (rather than the usual HTML) can hide their window's titlebar. It may have been possible to abuse this ablity to create more convincing spoof and phishing pages.


An attacker may be able to create phishing or spoofed websites.



Mozilla has released Firefox and SeaMonkey 1.1.5 to address this issue.

Vendor Information

Affected   Unknown   Unaffected


Updated:  October 19, 2007



Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


See for more details.

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

CVSS Metrics

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



Thanks to Mozilla for information that was used in this report. Mozilla credits Eli Friedman for discovering this vulnerability.

This document was written by Ryan Giobbi.

Other Information

CVE IDs: CVE-2007-5334
Severity Metric: 3.23
Date Public: 2007-10-19
Date First Published: 2007-10-19
Date Last Updated: 2007-10-19 19:05 UTC
Document Revision: 3

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