CVE-2025-12431: 
vulnerability analysis and mitigation

CVE-2025-12431 is a high-severity vulnerability in Google Chrome's Extensions implementation discovered prior to version 142.0.7444.59. The vulnerability allows an attacker who convinces a user to install a malicious extension to bypass navigation restrictions via a crafted Chrome Extension (Chrome Releases, Ubuntu Security).

The vulnerability has been assigned a CVSS 3.1 base score of 6.5 (Medium), with the following characteristics: Network attack vector, Low attack complexity, No privileges required, No user interaction needed, Unchanged scope, Low confidentiality impact, and Low integrity impact with no availability impact. The vulnerability was reported by security researcher Alesandro Ortiz on August 6, 2025, and was awarded a $4,000 bug bounty (Chrome Releases, Ubuntu Security).

The vulnerability allows attackers to bypass navigation restrictions through malicious Chrome extensions, potentially compromising user security by circumventing built-in browser security controls. The impact is characterized by low confidentiality and integrity breaches, though there is no direct impact on system availability (Ubuntu Security).

The vulnerability has been patched in Chrome version 142.0.7444.59 and later versions. Users and organizations are strongly advised to update their Chrome browsers to the latest version. The fix has been incorporated into various Chrome-based browsers, including Prisma Browser version 142.15.2.60 (Chrome Releases, Palo Alto Networks).