CVE-2025-24192 is a vulnerability identified in Apple Safari browsers that allows a malicious website to leak sensitive user data. The root cause is related to a script import issue where insufficient isolation between scripts enables unauthorized data access during web page rendering. This flaw affects Safari versions prior to 18.4 on Apple platforms including iOS 18.4, iPadOS 18.4, macOS Sequoia 15.4, and visionOS 2.4. The vulnerability does not require any privileges or authentication but does require user interaction in the form of visiting a crafted website. The impact is limited to confidentiality, as the vulnerability does not affect data integrity or system availability. Apple fixed the issue by enhancing script isolation mechanisms in the browser, preventing scripts from accessing data they should not. Although no known exploits have been reported in the wild, the vulnerability poses a risk of sensitive data leakage such as cookies, tokens, or other private information accessible via the browser. The CVSS v3.1 score of 6.5 reflects a medium severity, driven by network attack vector, low attack complexity, no privileges required, but requiring user interaction. This vulnerability highlights the importance of sandboxing and script isolation in modern browsers to protect user data from malicious web content.

The primary impact of CVE-2025-24192 is the potential leakage of sensitive user data when a user visits a malicious website using an affected Safari browser. This can lead to exposure of confidential information such as session tokens, cookies, personal identifiers, or other sensitive data accessible through the browser context. For organizations, this could result in unauthorized access to internal systems, data breaches, or compromise of user accounts if attackers leverage leaked credentials or tokens. Since the vulnerability does not affect data integrity or availability, it is less likely to cause system disruption but can severely impact privacy and confidentiality. The ease of exploitation (no privileges required, only user interaction) increases the risk, especially in environments where users frequently browse untrusted websites. The lack of known exploits in the wild reduces immediate risk but does not eliminate the threat, as attackers may develop exploits following public disclosure. Organizations relying on Apple devices for sensitive operations or handling confidential data are at higher risk of targeted exploitation.

1. Immediately update all Apple devices to Safari 18.4 or later and corresponding OS versions (iOS 18.4, iPadOS 18.4, macOS Sequoia 15.4, visionOS 2.4) to apply the patch that fixes the script isolation issue. 2. Implement network-level web filtering to block access to known malicious or suspicious websites to reduce exposure. 3. Educate users about the risks of visiting untrusted websites and encourage cautious browsing behavior. 4. Use additional browser security features such as content blockers, script blockers, or privacy extensions that limit script execution and data access. 5. Monitor network and endpoint logs for unusual data exfiltration patterns or suspicious web activity that could indicate exploitation attempts. 6. For organizations with high security requirements, consider restricting Safari usage or enforcing managed browser configurations with limited script permissions. 7. Regularly review and update incident response plans to include scenarios involving browser-based data leakage vulnerabilities.