CVE-2024-5739Network attack vector

Content and session compromise via cross-frame script execution

Published Jun 12, 2024 · Updated Mar 28, 2025

Universal XSS in LINE Corporation's LINE client for iOS before 14.9.0 allows remote attackers to run script in top-frame origins. The in-app browser lets JavaScript from an attacker-controlled embedded iframe escape its frame and execute in the displayed site's top-frame origin after a click event. A victim must open a URL in LINE and click the iframe; the resulting script can capture or alter displayed content and user session information.

CVSS severity6.4
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Universal XSS in LINE Corporation's LINE client for iOS before 14.9.0 allows remote attackers to run script in top-frame origins. The in-app browser lets JavaScript from an attacker-controlled embedded iframe escape its frame and execute in the displayed site's top-frame origin after a click event. A victim must open a URL in LINE and click the iframe; the resulting script can capture or alter displayed content and user session information.

The record

CVE
CVE-2024-5739
Published
Jun 12, 2024
Updated
Mar 28, 2025
Vendor
LINE Corporation
Product
LINE
Classifications
CWE-79, T1185
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=14.0.0 <14.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LINE Corporation · LINEversion=14.0.0 <14.9.0

Published CVSS scores

6.4LINE CorporationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H
6.1LINE CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1185Browser Session Hijacking

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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