Description
A vulnerability was discovered where specific command line arguments are not properly discarded during Firefox invocation as a shell handler for URLs. This could be used to retrieve and execute files whose location is supplied through these command line arguments if Firefox is configured as the default URI handler for a given URI scheme in third party applications and these applications insufficiently sanitize URL data. *Note: This issue only affects Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
Published: 2019-04-26
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2019-19156 A vulnerability was discovered where specific command line arguments are not properly discarded during Firefox invocation as a shell handler for URLs. This could be used to retrieve and execute files whose location is supplied through these command line arguments if Firefox is configured as the default URI handler for a given URI scheme in third party applications and these applications insufficiently sanitize URL data. *Note: This issue only affects Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
History

Tue, 25 Nov 2025 18:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Vendors & Products Mozilla firefox Esr

Subscriptions

Microsoft Windows
Mozilla Firefox Thunderbird
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2024-08-04T22:01:54.921Z

Reserved: 2019-03-14T00:00:00.000Z

Link: CVE-2019-9794

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-04-26T17:29:02.087

Modified: 2025-11-25T17:50:16.803

Link: CVE-2019-9794

cve-icon Redhat

Severity : Important

Publid Date: 2019-03-20T00:00:00Z

Links: CVE-2019-9794 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses