CVE-2025-0443: 
vulnerability analysis and mitigation

A vulnerability identified as CVE-2025-0443 was discovered in Google Chrome's Extensions feature prior to version 132.0.6834.83. The vulnerability was reported by an anonymous researcher on October 31, 2024, and publicly disclosed on January 14, 2025. The issue stems from insufficient data validation in the Extensions component, which could allow a remote attacker to perform privilege escalation through a crafted HTML page when a user engages in specific UI gestures (Chrome Release).

The vulnerability involves a bypass of local file access restrictions in chrome.devtools through prototype manipulation. The issue specifically affects the canAccessResource function in the Chrome DevTools frontend, where checks could be circumvented by overriding URL.prototype's protocol getter. This vulnerability was assigned a CVSS 3.1 Base Score of 8.8 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (NVD, Palo Alto).

The vulnerability could allow an attacker to bypass local file access restrictions and gain unauthorized access to local resources when users interact with such resources in the sources panel. This could potentially lead to privilege escalation and unauthorized access to sensitive local files (Chromium Issue).

The vulnerability was fixed in Google Chrome version 132.0.6834.83. Users are advised to update their Chrome browser to this version or later. The fix involved protecting the canAccessResource function in DevTools API from prototype pollution (Chrome Release).

The Chrome Vulnerability Rewards Program (VRP) Panel awarded the anonymous researcher $1,000 for reporting this vulnerability, categorizing it as a lower impact web platform privilege escalation issue (Chromium Issue).