CVE-2025-14021: line (CVSS 4.3)

Description

The in-app browser in LINE client for iOS versions prior to 14.14 is vulnerable to address bar spoofing, which could allow attackers to execute malicious JavaScript within iframes while displaying trusted URLs, enabling phishing attacks through overlaid malicious content.

Is your site exposed to CVE-2025-14021?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-451 CWE-451

Affected Products

Vendor	Product	Versions
linecorp	line	< 14.14.0

References

Other References

https://hackerone.com/reports/2548498

Frequently Asked Questions

What is CVE-2025-14021? +

The in-app browser in LINE client for iOS versions prior to 14.14 is vulnerable to address bar spoofing, which could allow attackers to execute malicious JavaScript within iframes while displaying trusted URLs, enabling phishing attacks through overlaid malicious content. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-14021? +

CVE-2025-14021 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-14021? +

CVE-2025-14021 affects products from linecorp, specifically: line. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-14021? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-45150

Zen is a firefox-based browser. Prior to 1.19.13b, Zen Browser did not provide a persistent, clearly visible security notification when …

CVE-2024-52277

User Interface (UI) Misrepresentation of Critical Information vulnerability in DocuSeal allows Content Spoofing.Displayed version does not show the layer flattened …

CVE-2024-52270

User Interface (UI) Misrepresentation of Critical Information vulnerability in DropBox Sign(HelloSign) allows Content Spoofing. Displayed version does not show the …

CVE-2024-52271

User Interface (UI) Misrepresentation of Critical Information vulnerability in Documenso allows Content Spoofing.Displayed version does not show the layer flattened …

CVE-2025-8043 9.8

Focus incorrectly truncated URLs towards the beginning instead of around the origin. This vulnerability was fixed in Firefox 141.

CVE-2025-31951 8.8

HCL BigFix RunBookAI is affected by a Unvalidated Command Input / Potential Command Smuggling vulnerability. A flaw in a component's …

CVE-2025-14021