How severe is CVE-2025-14020?

CVE-2025-14020 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-14020 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-14020?

CVE-2025-14020 affects Linecorp Line. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-14020?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-14020 have an EU (EUVD) identifier?

Yes. CVE-2025-14020 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203348.

When was CVE-2025-14020 published?

CVE-2025-14020 was published on 2025-12-15 and last updated on 2026-06-17.

CVE-2025-14020

CVE-2025-14020 is a medium-severity vulnerability in Linecorp Line with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-451.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203348
Weakness: CWE-451
Affected product: Linecorp Line
Published: 2025-12-15
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-14020?: CVE-2025-14020 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-14020 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-14020?: CVE-2025-14020 affects Linecorp Line. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-14020?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-14020 have an EU (EUVD) identifier?: Yes. CVE-2025-14020 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203348.
When was CVE-2025-14020 published?: CVE-2025-14020 was published on 2025-12-15 and last updated on 2026-06-17.

References

https://hackerone.com/reports/2547989

Affected products (1)

cpe:2.3:a:linecorp:line:*:*:*:*:*:android:*:*

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