Improper Restriction of Rendered UI Layers or Frames in Mozilla Firefox and Firefox ESR - CVE-2021-38508
Published: November 2, 2021
Vulnerability identifier: #VU57882
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-38508
CWE-ID: CWE-1021
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 attack.
The vulnerability exists due to Firefox displays the form validity message in the correct location at the same time as a permission prompt (such as for geolocation). The validity message could have obscured the prompt, resulting in the user potentially being tricked into granting the permission.
How to mitigate CVE-2021-38508
Install updates from vendor's website.