CVE-2020-6824

Name: CVE-2020-6824
Creator: NVD / NIST
Published: 2020-04-24T16:15:13.68+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.8/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2020-6824 is a low-severity vulnerability rated 2.8/10 on the CVSS scale. Initially, a user opens a Private Browsing Window and generates a password for a site, then closes the Private Browsing Window but leaves Firefox open. Subsequently, if the user had opened a new Private Browsing Window, revisited the same site, and generated a new password - the generated passwords would have been identical, rather than independent. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

Description

Initially, a user opens a Private Browsing Window and generates a password for a site, then closes the Private Browsing Window but leaves Firefox open. Subsequently, if the user had opened a new Private Browsing Window, revisited the same site, and generated a new password - the generated passwords would have been identical, rather than independent. This vulnerability affects Firefox < 75.

Metrics

CVSS 3.1

2.8/10

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

EPSS Probability

0.27%

18.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-384

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 75.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1621853Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2020-12/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1621853Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2020-12/Vendor Advisory

Timeline

Published: Apr 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-6824?

How severe is CVE-2020-6824?

CVE-2020-6824 has a CVSS score of 2.8/10 (LOW severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2020-6824?

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-2020-6824?

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

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Source: NVD / NIST