Vulnerability DatabaseCVE-2019-9809
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CVE-2019-9809
Published:April 26, 2019
Updated:May 17, 2026
If the source for resources on a page is through an FTP connection, it is possible to trigger a series of modal alert messages for these resources through invalid credentials or locations. These messages cannot be immediately dismissed, allowing for a denial of service (DOS) attack. This vulnerability affects Firefox < 66.
Related Resources (4)
https://bugzilla.mozilla.org/show_bug.cgi?id=1282430
https://www.mozilla.org/security/advisories/mfsa2019-07/
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-9809
https://bugzilla.mozilla.org/show_bug.cgi?id=1523249
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
EPSS
Base Score:
0.48