CVE-2025-24208 is a cross-site scripting (XSS) vulnerability identified in Apple’s iOS and iPadOS platforms, specifically impacting the Safari browser prior to version 18.4. The root cause is a permissions issue related to the handling of iframes, where loading a malicious iframe can lead to script execution in the context of the parent page. This vulnerability falls under CWE-79, which covers improper neutralization of input leading to XSS attacks. The attack vector is network-based (AV:N), requiring no privileges (PR:N) but does require user interaction (UI:R), such as visiting a maliciously crafted webpage. The vulnerability has a CVSS v3.1 base score of 6.1, indicating medium severity. The scope is changed (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component. The impact affects confidentiality and integrity (C:L/I:L) but not availability (A:N). Exploiting this vulnerability could allow attackers to steal sensitive information like cookies, session tokens, or perform actions on behalf of the user. Apple addressed the issue by implementing additional restrictions in Safari 18.4 and corresponding iOS and iPadOS updates, which prevent malicious iframes from executing unauthorized scripts. No public exploits are currently known, but the vulnerability’s presence in widely used mobile platforms makes it a significant concern for users and organizations relying on Apple devices.

For European organizations, this vulnerability poses a risk primarily to confidentiality and integrity of data accessed via Safari on iOS and iPadOS devices. Attackers could leverage malicious iframes embedded in websites or phishing campaigns to execute scripts that steal session cookies, credentials, or other sensitive information. This can lead to unauthorized access to corporate resources, data breaches, or further lateral movement within networks. The impact is heightened for organizations with a mobile workforce heavily reliant on Apple devices, especially in sectors like finance, healthcare, and government where sensitive data is handled. Although availability is not affected, the breach of confidentiality and integrity can result in regulatory penalties under GDPR, reputational damage, and financial losses. The requirement for user interaction means that user awareness and phishing defenses remain critical. Since no known exploits are in the wild, timely patching can effectively mitigate the risk before widespread exploitation occurs.

1. Immediately update all iOS and iPadOS devices to version 18.4 or later, and ensure Safari is updated to 18.4 or above to apply the security fix. 2. Implement strict Content Security Policies (CSP) on corporate web assets to restrict iframe sources and prevent injection of malicious content. 3. Educate users about the risks of clicking on unknown or suspicious links, especially on mobile devices. 4. Employ mobile device management (MDM) solutions to enforce timely OS and browser updates across the organization’s Apple device fleet. 5. Monitor network traffic for unusual iframe or script injection activity, particularly from external or untrusted sources. 6. Use web filtering solutions to block access to known malicious websites that could host exploit payloads. 7. Conduct regular security awareness training focusing on phishing and social engineering attacks that could deliver malicious iframes. 8. Review and limit third-party web content embedded in corporate web applications to reduce attack surface.