CVE-2025-14023: 
NixOS vulnerability analysis and mitigation

CVE-2025-14023 is a UI spoofing vulnerability in the LINE client for iOS affecting versions prior to 15.19. The flaw arises from inconsistencies between the navigation state and the in-app browser's user interface, which can create confusion about the trust context of displayed pages or interactive elements under specific conditions. It was published on December 15, 2025, and assigned by LY Corporation. The vulnerability carries a CVSS v3.1 base score of 4.3 (Medium) (Red Hat CVE, ENISA EUVD).

The root cause is classified as CWE-451 (User Interface Misrepresentation of Critical Information). The vulnerability stems from a mismatch between the app's internal navigation state and what the in-app browser's UI displays to the user, allowing an attacker to craft scenarios where the displayed URL or trust indicators do not accurately reflect the actual page context. Exploitation requires network access and user interaction (e.g., a user clicking a malicious link within the LINE app), but requires no privileges or authentication. The vulnerability was originally reported via HackerOne (report #3260386) (ENISA EUVD).

Successful exploitation could allow an attacker to deceive users into believing they are interacting with a trusted page when they are not, facilitating phishing, credential theft, or social engineering attacks. The integrity impact is rated low, with no direct confidentiality or availability impact. The primary risk is user deception leading to secondary compromise, such as submission of credentials or sensitive information to attacker-controlled content (Red Hat CVE, ENISA EUVD).

There is no known public exploit code, active in-the-wild exploitation, or threat actor attribution associated with CVE-2025-14023 at this time. The EPSS score is approximately 0.029% (0.000290), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. User interaction is required, which further limits the practical exploitability of this issue (Red Hat CVE).

1. Reconnaissance: Identify LINE iOS users running a version prior to 15.19 as potential targets.
2. Craft malicious link: Prepare a URL or in-app link that, when opened in LINE's in-app browser, triggers the navigation state inconsistency — causing the browser UI to display misleading trust indicators (e.g., a spoofed address bar or page context).
3. Deliver link to target: Send the crafted link to the victim via LINE chat, group message, or other social engineering vector, inducing the user to tap the link within the LINE app.
4. Exploit UI confusion: When the victim opens the link, the in-app browser displays a misleading UI (e.g., showing a trusted domain while rendering attacker-controlled content), creating a false sense of security.
5. Harvest credentials or data: The victim, believing they are on a trusted page, submits credentials or sensitive information that is captured by the attacker (ENISA EUVD).

LY Corporation has addressed this vulnerability in LINE for iOS version 15.19 and later. Users should update the LINE app to version 15.19 or above via the Apple App Store. No configuration-based workaround is documented; upgrading is the recommended and only confirmed remediation (Red Hat CVE, ENISA EUVD).

Coverage of CVE-2025-14023 has been limited to automated vulnerability tracking platforms and aggregators such as Vulners, CIRCL, and CVEFeed. A brief technical summary was published by Infinit Security (Infinit Security). No notable vendor statements beyond the patch release, significant researcher commentary, or broad media coverage have been identified for this vulnerability.