CVE-2020-26953

It was possible to cause the browser to enter fullscreen mode without displaying the security UI; thus making it possible to attempt a phishing attack or otherwise confuse the user. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

Score

CVSS 3.1 4.3 Medium

Status

Modified - security@mozilla.org

Published

2020-12-09

Last modified

2024-08-04

Weaknesses

CWE-1021

Affected products

• Firefox (Mozilla)
• Firefox Esr (Mozilla)
• Thunderbird (Mozilla)

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1656741
• https://www.mozilla.org/security/advisories/mfsa2020-50/
• https://www.mozilla.org/security/advisories/mfsa2020-51/
• https://www.mozilla.org/security/advisories/mfsa2020-52/