CVE-2024-8386

Name: CVE-2024-8386
Creator: NVD / NIST
Published: 2024-09-03T13:15:05.86+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2024-8386 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. If a site had been granted the permission to open popup windows, it could cause Select elements to appear on top of another site to perform a spoofing attack. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Thunderbird < 128.2.. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

If a site had been granted the permission to open popup windows, it could cause Select elements to appear on top of another site to perform a spoofing attack. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Thunderbird < 128.2.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.37%

28.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 130.0
Mozilla	Firefox Esr	< 128.2

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1907032Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1909163Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1909529Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2024-39/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-40/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-43/

Timeline

Published: Sep 3, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-8386?

How severe is CVE-2024-8386?

CVE-2024-8386 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2024-8386?

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-2024-8386?

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

Scan your code now

Source: NVD / NIST