CVE-2020-6810

critical
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
9.5

Description

After a website had entered fullscreen mode, it could have used a previously opened popup to obscure the notification that indicates the browser is in fullscreen mode. Combined with spoofing the browser chrome, this could have led to confusing the user about the current origin of the page and credential theft or other attacks. This vulnerability affects Firefox < 74.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-6810

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-6810.html

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-202003-8

OS impact

OSVersionStatusFixed in
arch archfixed74.0-1
suse slesaffected
debian debiansidfixed74.0-1

References

Verify integrity in audit chain (admin only). AS-IS.