CVE-2020-6824

Severity: low (CVSS 2.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-04-24 · updated 2026-06-17
Weakness: CWE-384

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.

Affected products

Mozilla Firefox: before 75.0 — fixed in 75.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 75.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1621853
https://www.mozilla.org/security/advisories/mfsa2020-12/
https://bugzilla.mozilla.org/show_bug.cgi?id=1621853
https://www.mozilla.org/security/advisories/mfsa2020-12/

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