What is CVE-2022-22820?

CVE-2022-22820 is a medium-severity vulnerability in Linecorp Line, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2022-01-20.

How severe is CVE-2022-22820?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Improper input validation in Linecorp Line

CVE-2022-22820

Due to the lack of media file checks before rendering, it was possible for an attacker to cause abnormal CPU consumption for message recipient by sending specially crafted gif image in LINE for Windows before 7.4.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2022-01-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.1% 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 For Windows — versions <

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

hackerone.com/reports/1357400 (Permissions Required)

Frequently asked questions

What is CVE-2022-22820?: CVE-2022-22820 is a medium-severity vulnerability in Linecorp Line, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2022-01-20.
How severe is CVE-2022-22820?: Medium severity. CVSS v3 base score is 5.5 out of 10.