Insufficient UI Warning of Dangerous Operations in Mozilla Firefox and Firefox ESR - CVE-2021-38506
Published: November 2, 2021
Vulnerability identifier: #VU57880
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-38506
CWE-ID: CWE-357
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Firefox ESR
Detailed vulnerability description
The vulnerability allows a remote attacker to perform spoofing attacks.
The vulnerability exists due to Firefox could have entered fullscreen mode without notification or warning to the user. A remote attacker can perform spoofing attacks on the browser UI.
How to mitigate CVE-2021-38506
Install updates from vendor's website.