CVE-2025-14023 is a vulnerability identified in the LINE client for iOS, specifically affecting versions prior to 15.19. The issue stems from a UI spoofing flaw caused by inconsistencies between the navigation state and the in-app browser's user interface. This discrepancy can cause confusion about the trust context of displayed pages or interactive elements, potentially tricking users into believing they are interacting with legitimate content when they are not. The vulnerability is categorized under CWE-451, which relates to improper UI consistency leading to spoofing attacks. Exploitation requires no privileges but does require user interaction, and the attack complexity is high, meaning an attacker must carefully craft conditions to exploit this flaw. The CVSS score is 3.1, reflecting a low severity primarily due to the lack of confidentiality or availability impact and the need for user interaction. No patches are linked yet, and no known exploits have been reported in the wild. The vulnerability could be leveraged in phishing or social engineering attacks within the LINE app, potentially leading users to disclose sensitive information or perform unintended actions under false trust assumptions.

For European organizations, the impact of CVE-2025-14023 is primarily related to user trust and potential social engineering risks rather than direct system compromise. Since the vulnerability allows UI spoofing, attackers could deceive users into interacting with malicious content disguised as legitimate within the LINE app, potentially leading to credential theft or unauthorized actions. However, the low CVSS score and high attack complexity reduce the likelihood of widespread exploitation. Organizations relying on LINE for internal or external communications might face increased phishing risks, especially if users are not trained to recognize suspicious UI behavior. The impact on confidentiality and availability is minimal, but integrity could be indirectly affected if users are misled into performing harmful actions. This threat is more relevant for sectors with high communication dependency on LINE, such as customer service, sales, or collaboration teams.

To mitigate CVE-2025-14023, European organizations should prioritize updating the LINE client for iOS to version 15.19 or later once available, as this will address the UI spoofing inconsistencies. Until patches are applied, organizations should implement targeted user awareness training focusing on recognizing suspicious UI elements and avoiding interaction with unexpected links or prompts within the LINE app. Deploy mobile device management (MDM) solutions to enforce app updates and restrict installation of outdated versions. Additionally, monitoring for unusual user behavior or reports of suspicious messages within LINE can help detect potential exploitation attempts. Organizations should also consider restricting sensitive communications over LINE until the vulnerability is patched, especially in high-risk environments. Finally, encouraging multi-factor authentication (MFA) for accounts accessed via LINE can reduce the impact of potential credential theft resulting from UI spoofing attacks.