Mozilla Firefox up to 61.x on Android Address Bar input validation

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability classified as critical has been found in Mozilla Firefox up to 61.x on Android (Web Browser). Affected is an unknown code of the component Address Bar. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The displayed addressbar URL can be spoofed on Firefox for Android using a javascript: URI in concert with JavaScript to insert text before the loaded domain name, scrolling the loaded domain out of view to the right. This can lead to user confusion. *This vulnerability only affects Firefox for Android < 62.*

The bug was discovered 09/05/2018. The weakness was released 10/18/2018 as Bug 1479311 as confirmed bug report (Bugzilla). The advisory is available at This vulnerability is traded as CVE-2018-12382 since 06/14/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/30/2023).

The vulnerability scanner Nessus provides a plugin with the ID 117291 (Mozilla Firefox < 62 Multiple Critical Vulnerabilities (macOS)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371173 (Mozilla Firefox Multiple Vulnerabilities (MFSA-2018-20,MFSA-2018-21)).

Upgrading to version 62.0 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (117291). Entries connected to this vulnerability are available at 125760, 125761, 125762 and 125763.







CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
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Class: Input validation
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Current Price Estimation: 🔍


Nessus ID: 117291
Nessus Name: Mozilla Firefox < 62 Multiple Critical Vulnerabilities (macOS)
Nessus File: 🔍
Nessus Risk: 🔍
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Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 62.0


06/14/2018 🔍
09/05/2018 +83 days 🔍
09/05/2018 +0 days 🔍
09/05/2018 +0 days 🔍
09/06/2018 +1 days 🔍
10/18/2018 +41 days 🔍
10/18/2018 +0 days 🔍
10/19/2018 +1 days 🔍
05/30/2023 +1684 days 🔍



Advisory: Bug 1479311
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-12382 (🔍)
SecurityTracker: 1041610
SecurityFocus: 105276 - Mozilla Firefox MFSA2018-20 Multiple Security Vulnerabilities

scip Labs:
See also: 🔍


Created: 10/19/2018 06:45 AM
Updated: 05/30/2023 10:51 AM
Changes: 10/19/2018 06:45 AM (74), 04/05/2020 12:57 PM (4), 05/30/2023 10:51 AM (4)
Complete: 🔍


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