Is CVE-2024-5739 actively exploited?

No active exploitation of CVE-2024-5739 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2024-5739 be exploited remotely?

Yes. CVE-2024-5739 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2024-5739?

CVE-2024-5739 has a CVSS score of 6.1 (MEDIUM).

HOME VULNERABILITIESCVE-2024-5739

MEDIUM

CVE-2024-5739

CWE-79Published: June 12, 2024· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

The in-app browser of LINE client for iOS versions below 14.9.0 contains a Universal XSS (UXSS) vulnerability. This vulnerability allows for cross-site scripting (XSS) where arbitrary JavaScript can be executed in the top frame from an embedded iframe on any displayed web site within the in-app browser. The in-app browser is usually opened by tapping on URLs contained in chat messages, and for the attack to be successful, the victim must trigger a click event on a malicious iframe. If an iframe embedded in any website can be controlled by an attacker, this vulnerability could be exploited to capture or alter content displayed in the top frame, as well as user session information. This vulnerability affects LINE client for iOS versions below 14.9.0 and does not affect other LINE clients such as LINE client for Android. Please update LINE client for iOS to version 14.9.0 or higher.

NVD Source

Technical Analysis

CVE-2024-5739 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.