CVE-2025-13631 is a vulnerability identified in the Google Updater component of Google Chrome on macOS platforms, affecting versions prior to 143.0.7499.41. The flaw arises from an inappropriate implementation in the updater mechanism that processes files used during the update process. A remote attacker can exploit this vulnerability by delivering a specially crafted file that triggers a privilege escalation, allowing the attacker to gain higher system privileges than intended. This escalation can compromise system confidentiality, integrity, and availability by enabling unauthorized code execution or system modifications. The vulnerability has a CVSS 3.1 base score of 8.8, reflecting high severity, with attack vector being network-based (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R). The scope remains unchanged (S:U), and the impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H). Although no public exploits have been reported yet, the potential for exploitation is significant given the ease of attack and impact. The vulnerability specifically targets macOS users of Google Chrome, emphasizing the need for timely patching and secure update handling.

For European organizations, this vulnerability poses a substantial risk, especially those with significant macOS deployments using Google Chrome. Successful exploitation could lead to unauthorized privilege escalation, enabling attackers to execute arbitrary code with elevated rights, potentially leading to data breaches, system compromise, or disruption of services. Sectors such as finance, government, healthcare, and critical infrastructure are particularly vulnerable due to the sensitivity of their data and reliance on secure computing environments. The compromise of endpoints could facilitate lateral movement within networks, increasing the scope of impact. Additionally, the requirement for user interaction means phishing or social engineering campaigns could be leveraged to trigger the exploit, increasing the attack surface. Given the widespread use of Chrome in Europe and the growing macOS market share, the vulnerability could affect a broad range of organizations if unpatched.

The primary mitigation is to update Google Chrome on all macOS devices to version 143.0.7499.41 or later, where the vulnerability has been addressed. Organizations should enforce automated update policies to ensure timely patch deployment. Additionally, implementing application whitelisting and restricting execution of untrusted files can reduce the risk of exploitation. User training to recognize and avoid suspicious files or links is critical due to the requirement for user interaction. Employ endpoint detection and response (EDR) solutions to monitor for anomalous privilege escalation behaviors. Network segmentation and least privilege principles should be applied to limit the potential impact of a compromised device. Regular vulnerability scanning and asset inventory to identify vulnerable Chrome versions will aid in targeted remediation. Finally, organizations should monitor threat intelligence feeds for any emerging exploit activity related to this CVE.