CVE-2019-9807

Name: CVE-2019-9807
Creator: NVD / NIST
Published: 2019-04-26T17:29:03.71+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.79%

Last modified Jun 17, 2026

CVE-2019-9807 is a vulnerability of currently unknown severity. When arbitrary text is sent over an FTP connection and a page reload is initiated, it is possible to create a modal alert message with this text as the content. This could potentially be used for social engineering attacks. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

Description

When arbitrary text is sent over an FTP connection and a page reload is initiated, it is possible to create a modal alert message with this text as the content. This could potentially be used for social engineering attacks. This vulnerability affects Firefox < 66.

Metrics

EPSS Probability

0.79%

51.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 66.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1362050Exploit, Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-07/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1362050Exploit, Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-07/Vendor Advisory

Timeline

Published: Apr 26, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-9807?

How severe is CVE-2019-9807?

Severity scoring for CVE-2019-9807 is pending analysis. The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2019-9807?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-9807?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST