What is CVE-2021-26617?

CVE-2021-26617 is a high-severity vulnerability in Firstmall, classified under Improper Input Validation. CVSS score: 8.1/10. Published 2022-02-25.

How severe is CVE-2021-26617?

High severity. CVSS v3 base score is 8.1 out of 10.

Improper input validation in Firstmall

CVE-2021-26617

This issues due to insufficient verification of the various input values from user’s input. The vulnerability allows remote attackers to execute malicious code in Firstmall via navercheckout_add function.

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

Published 2022-02-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (68.8th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Firstmall
Gabia Co., Ltd Firstmall — versions multilingual latest version
Microsoft Windows

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.krcert.or.kr/krcert/secNoticeView.do (Third Party Advisory)

Frequently asked questions

What is CVE-2021-26617?: CVE-2021-26617 is a high-severity vulnerability in Firstmall, classified under Improper Input Validation. CVSS score: 8.1/10. Published 2022-02-25.
How severe is CVE-2021-26617?: High severity. CVSS v3 base score is 8.1 out of 10.