What is CVE-2025-14020?

CVE-2025-14020 is a medium-severity vulnerability in Linecorp Line, classified under User Interface (UI) Misrepresentation of Critical Information. CVSS score: 5.4/10. Published 2025-12-15.

How severe is CVE-2025-14020?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Linecorp Line

CVE-2025-14020

LINE client for Android versions prior to 14.20 contains a UI spoofing vulnerability in the in-app browser where the full-screen security Toast notification is not properly re-displayed when users return from another application, potentially allowing attackers to conduct phishing attacks by impersonating legitimate interfaces.

Published 2025-12-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (6.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Linecorp Line
Line Corporation Client For Android — versions 10.0

Weakness classification (CWE)

CWE-451 — User Interface (UI) Misrepresentation of Critical Information

References

hackerone.com/reports/2547989 (Permissions Required, Third Party Advisory)

Frequently asked questions

What is CVE-2025-14020?: CVE-2025-14020 is a medium-severity vulnerability in Linecorp Line, classified under User Interface (UI) Misrepresentation of Critical Information. CVSS score: 5.4/10. Published 2025-12-15.
How severe is CVE-2025-14020?: Medium severity. CVSS v3 base score is 5.4 out of 10.