CVE-2020-6824

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.

Published: 2020-04-24 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-6824 is rated Low Risk (17.9/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.27%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-6824

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.13% 0.27% +0.14%
2 2025-11-21 0.04% 0.13% +0.09%
3 2025-11-18 — 0.04% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-6824

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
2.8 3.1 LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.3 1.4 [email protected]
1.9 2.0 LOW
AV:L/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 3.4 2.9 [email protected]

Weakness enumeration for CVE-2020-6824

OS Trackers for CVE-2020-6824

vendor priority summary link
alpine low CVE-2020-6824: 2 source package rows (firefox, librewolf); 20 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 10, open 10. https://security.alpinelinux.org/vuln/CVE-2020-6824
debian not yet assigned CVE-2020-6824 not yet assigned priority: Debian including 1 source packages (firefox), 1 status rows across 1 suites (sid): resolved 1. https://security-tracker.debian.org/tracker/CVE-2020-6824
gentoo normal CVE-2020-6824: 1 GLSA(s) (202004-11), 2 atom(s) (www-client/firefox, www-client/firefox-bin); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-6824
redhat medium — https://access.redhat.com/security/cve/CVE-2020-6824
suse high CVE-2020-6824 severity important: SUSE including 9 source package names (MozillaFirefox-92.0-1.2, MozillaFirefox-branding-upstream-92.0-1.2, …), 9 product×package rows across 1 product lines (openSUSE Tumbleweed): Fixed 9. https://www.suse.com/security/cve/CVE-2020-6824/
ubuntu medium CVE-2020-6824 medium priority: Ubuntu including 5 source packages (firefox, mozjs38, mozjs52, mozjs60, mozjs68), 70 status rows across 14 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, trusty, upstream, xenial): DNE 45, released 13, ignored 12. https://ubuntu.com/security/CVE-2020-6824

Affected software / configurations for CVE-2020-6824

Vendor Product Version Raw CPE
mozilla firefox < 75.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

References for CVE-2020-6824

cvelogic Threat Intelligence