How severe is CVE-2021-36214?

CVE-2021-36214 has a CVSS 3.x base score of 6.1, 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-2021-36214 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36214?

CVE-2021-36214 affects Linecorp Line. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36214?

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

When was CVE-2021-36214 published?

CVE-2021-36214 was published on 2021-07-13 and last updated on 2026-06-17.

CVE-2021-36214

CVE-2021-36214 is a medium-severity vulnerability in Linecorp Line with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Linecorp Line
Published: 2021-07-13
Last modified: 2026-06-17

Description

LINE client for iOS before 10.16.3 allows cross site script with specific header in WebView.

Frequently asked questions

What is CVE-2021-36214?: LINE client for iOS before 10.16.3 allows cross site script with specific header in WebView.
How severe is CVE-2021-36214?: CVE-2021-36214 has a CVSS 3.x base score of 6.1, 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-2021-36214 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36214?: CVE-2021-36214 affects Linecorp Line. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36214?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-36214 published?: CVE-2021-36214 was published on 2021-07-13 and last updated on 2026-06-17.

References

https://hackerone.com/reports/988332

Affected products (1)

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

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