How severe is CVE-2025-14021?

CVE-2025-14021 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2025-14021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-14021?

CVE-2025-14021 affects Linecorp Line. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-14021?

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

Does CVE-2025-14021 have an EU (EUVD) identifier?

Yes. CVE-2025-14021 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203345.

When was CVE-2025-14021 published?

CVE-2025-14021 was published on 2025-12-15 and last updated on 2026-06-17.

CVE-2025-14021

CVE-2025-14021 is a medium-severity vulnerability in Linecorp Line with a CVSS 3.x base score of 4.3. 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 4.3)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203345
Weakness: CWE-451
Affected product: Linecorp Line
Published: 2025-12-15
Last modified: 2026-06-17

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.

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.
How severe is CVE-2025-14021?: CVE-2025-14021 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-14021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-14021?: CVE-2025-14021 affects Linecorp Line. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-14021?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-14021 have an EU (EUVD) identifier?: Yes. CVE-2025-14021 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203345.
When was CVE-2025-14021 published?: CVE-2025-14021 was published on 2025-12-15 and last updated on 2026-06-17.

References

https://hackerone.com/reports/2548498

Affected products (1)

cpe:2.3:a:linecorp:line:*:*:*:*:*:iphone_os:*:*

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