Spoofing attack in Apple Safari - CVE-2025-43503

Vulnerability identifier: #VU118045

CSH Severity: Medium

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-43503

CWE-ID: CWE-451

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data. A remote attacker can trick the victim into visiting a specially crafted website and spoof the user interface. 

Apple Safari
visionOS
iPadOS
Apple iOS
macOS
watchOS

Install updates from vendor's website.

Apple Safari - update to 26.1
visionOS - update to 26.1
iPadOS - addressed in versions 18.7.2 22H124, 26.1 23B85
Apple iOS - addressed in versions 18.7.2 22H124, 26.1 23B85
macOS - update to 26.1 25B78
watchOS - update to 26.1 23S37

• https://support.apple.com/en-us/125640

• Multiple vulnerabilities in Apple Safari
• Multiple vulnerabilities in Apple macOS Tahoe
• Multiple vulnerabilities in Apple iOS 26 and iPadOS 26
• Multiple vulnerabilities in Apple visionOS
• Multiple vulnerabilities in Apple watchOS
• Multiple vulnerabilities in Apple iOS 18 and iPadOS 18