Opera < 7.50 onUnload Address Bar Spoofing

medium Nessus Plugin ID 14244
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An installed browser is vulnerable to address bar spoofing.


The remote host is using Opera - an alternative web browser.

This version of Opera is vulnerable to a security weakness that may permit malicious web pages to spoof address bar information.

This is reportedly possible through malicious use of the JavaScript 'unOnload' event handler when the browser is redirected to another page.

This issue could be exploited to spoof the domain of a malicious web page, potentially causing the user to trust the spoofed domain.


Install Opera 7.50 or later.

Plugin Details

Severity: Medium

ID: 14244

File Name: opera_address_bar_spoofing.nasl

Version: 1.18

Type: local

Agent: windows

Family: Windows

Published: 8/10/2004

Updated: 7/16/2018

Dependencies: opera_installed.nasl

Risk Information


Risk Factor: Low

Score: 3.4


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:opera:opera_browser

Required KB Items: SMB/Opera/Version

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 5/13/2004

Reference Information

CVE: CVE-2004-2260

BID: 10337