Insufficient UI Warning of Dangerous Operations in Firefox ESR and Mozilla Firefox - CVE-2020-26953
Published: November 17, 2020
Vulnerability identifier: #VU48461
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-2020-26953
CWE-ID:
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Firefox ESR
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Detailed vulnerability description
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to the way under certain conditions Firefox enters the fullscreen mode without displaying UI notification. A remote attacker can perform a phishing attack.
How to mitigate CVE-2020-26953
Install updates from vendor's website.