---
id: CVE-2025-14022
title: >-
  LINE client for iOS prior to 15.4 allows man-in-the-middle attacks due to
  improper SSL/TLS certificate validation in an integrated financial SDK
summary: >-
  LINE client for iOS prior to 15.4 allows man-in-the-middle attacks due to
  improper SSL/TLS certificate validation in an integrated financial SDK. The
  SDK interfered with the application's network processing, causing server
  certificate ve…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L'
cwe:
  - CWE-295
  - CWE-295
vendor: linecorp
product: line
affected:
  - line < 15.4.0
patched:
  - line 15.4.0
published: '2025-12-15'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T19:10:00.160'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-14022'
references:
  - url: 'https://hackerone.com/reports/2853445'
    label: dl_cve@linecorp.com
tags:
  - nvd
epss: 0.00162
epssPercentile: 0.04836
ingestedAt: '2026-10-07T19:44:15.682Z'
---

## Overview

LINE client for iOS prior to 15.4 allows man-in-the-middle attacks due to improper SSL/TLS certificate validation in an integrated financial SDK. The SDK interfered with the application's network processing, causing server certificate verification to be disabled for a significant portion of network traffic, which could allow a network-adjacent attacker to intercept or modify encrypted communications.

## Affected

- `line < 15.4.0`

## Remediation

Upgrade past the affected range:

- `line 15.4.0`