CVE-2025-1915 is a vulnerability identified in Google Chrome's DevTools on Windows platforms prior to version 134.0.6998.35. The issue stems from improper limitation of pathnames to restricted directories, which allows a maliciously crafted Chrome extension to bypass file access restrictions. Specifically, an attacker who convinces a user to install such an extension can exploit this flaw to access files outside the intended sandbox or restricted directories, potentially exposing sensitive user data or system files. The vulnerability is exploitable remotely over the network without requiring privileges but does require user interaction in the form of installing the malicious extension. The flaw affects the confidentiality and integrity of the system by enabling unauthorized file access and potential manipulation. The CVSS v3.1 score of 8.1 reflects the high impact and ease of exploitation given user interaction. Although no known exploits have been reported in the wild, the vulnerability poses a significant risk due to Chrome's widespread use and the common practice of installing extensions. The vulnerability highlights the importance of strict pathname validation within browser components, especially those like DevTools that have elevated access capabilities. Google has addressed this issue in Chrome version 134.0.6998.35, and users are urged to update promptly to mitigate risk.

The vulnerability allows attackers to bypass file access restrictions via a malicious Chrome extension, potentially exposing sensitive files and data on affected Windows systems. This can lead to unauthorized disclosure of confidential information, manipulation of files, and compromise of user privacy and system integrity. Organizations relying heavily on Chrome and its extensions, especially in environments where users have the ability to install extensions, face increased risk of targeted attacks or data breaches. While availability is not impacted, the breach of confidentiality and integrity can have severe consequences, including intellectual property theft, exposure of personal data, and undermining trust in organizational IT infrastructure. The ease of exploitation combined with the widespread use of Chrome increases the potential attack surface globally.

1. Immediately update Google Chrome to version 134.0.6998.35 or later, where the vulnerability is patched. 2. Implement strict policies to control and limit the installation of Chrome extensions, especially from untrusted sources. 3. Educate users about the risks of installing extensions and encourage verification of extension authenticity. 4. Employ endpoint security solutions that monitor and restrict unauthorized file access by browser extensions. 5. Regularly audit installed extensions and remove any that are unnecessary or suspicious. 6. Use enterprise management tools to enforce extension whitelisting and prevent sideloading of unapproved extensions. 7. Monitor network and system logs for unusual file access patterns that may indicate exploitation attempts.