vulnerability
MFSA2023-29 Firefox: Security Vulnerabilities fixed in Firefox 116 (CVE-2023-4053)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:N/I:C/A:N) | Aug 1, 2023 | Aug 2, 2023 | Mar 27, 2026 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:N/I:C/A:N)
Published
Aug 1, 2023
Added
Aug 2, 2023
Modified
Mar 27, 2026
Description
A website could have obscured the full screen notification by using a URL with a scheme handled by an external program, such as a mailto URL. This could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox < 116, Firefox ESR < 115.2, and Thunderbird < 115.2.
Solution
mozilla-firefox-upgrade-116_0
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.