Mozilla Firefox up to 40 JavaScript information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in Mozilla Firefox up to 40 (Web Browser). It has been classified as critical. Affected is an unknown function of the component JavaScript Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 allow user-assisted remote attackers to bypass intended access restrictions and discover a redirect's target URL via crafted JavaScript code that executes after a drag-and-drop action of an image into a TEXTBOX element.

The weakness was released 09/24/2015 by Christian Holler (Website). The advisory is shared for download at This vulnerability is traded as CVE-2015-4519 since 06/10/2015. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 86514 (CentOS 5 / 6 / 7 : firefox (CESA-2015:1834)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168108 (OpenSuSE Security Update for MozillaFirefox (openSUSE-SU-2015:1658-1)).

Upgrading to version 41.0 eliminates this vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 20821.

The vulnerability is also documented in the databases at X-Force (106645) and Tenable (86514). Entries connected to this vulnerability are available at 78020, 78021, 78022 and 78023.







CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
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Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
ATT&CK: T1592

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

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Current Price Estimation: 🔍


Nessus ID: 86514
Nessus Name: CentOS 5 / 6 / 7 : firefox (CESA-2015:1834)
Nessus File: 🔍
Nessus Risk: 🔍
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OpenVAS ID: 703365
OpenVAS Name: Debian Security Advisory DSA 3365-1 (iceweasel - security update)
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 41.0
TippingPoint: 🔍


06/10/2015 🔍
09/22/2015 +104 days 🔍
09/22/2015 +0 days 🔍
09/24/2015 +2 days 🔍
09/24/2015 +0 days 🔍
09/24/2015 +0 days 🔍
09/25/2015 +1 days 🔍
06/19/2022 +2459 days 🔍



Advisory: RHSA-2015:1834
Researcher: Christian Holler
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-4519 (🔍)

X-Force: 106645 - Mozilla Firefox loaded image information disclosure
SecurityTracker: 1033640
Vulnerability Center: 52945 - Mozilla Firefox before 41 and Firefox ESR 38 before 38.3 Remote Information Disclosure of Final URL, Medium
SecurityFocus: 76816 - Mozilla Firefox Multiple Security Vulnerabilities

See also: 🔍


Created: 09/25/2015 05:58 PM
Updated: 06/19/2022 03:16 AM
Changes: 09/25/2015 05:58 PM (64), 01/03/2018 09:54 AM (13), 06/19/2022 03:00 AM (4), 06/19/2022 03:08 AM (1), 06/19/2022 03:16 AM (2)
Complete: 🔍


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