What is CVE-2021-36215?

CVE-2021-36215 is a medium-severity vulnerability in Linecorp Line. CVSS score: 5.3/10. Published 2021-09-08.

How severe is CVE-2021-36215?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Linecorp Line

CVE-2021-36215

LINE client for iOS 10.21.3 and before allows address bar spoofing due to inappropriate address handling.

Published 2021-09-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Linecorp Line
Line Corporation Client For iOS — versions <=

References

hackerone.com/reports/1082991 (Permissions Required)

Frequently asked questions

What is CVE-2021-36215?: CVE-2021-36215 is a medium-severity vulnerability in Linecorp Line. CVSS score: 5.3/10. Published 2021-09-08.
How severe is CVE-2021-36215?: Medium severity. CVSS v3 base score is 5.3 out of 10.