CVE-2021-26631: Mangboard parameter modulation vulnerability

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-05-19 · updated 2026-06-17
Weakness: CWE-20

Description

Improper input validation vulnerability in Mangboard commerce package could lead to occur for abnormal request. A remote attacker can exploit this vulnerability to manipulate the total order amount into a negative number and then pay for the order.

Affected products

Hometory Co.,Ltd Mangboard commerce package: before 1.3.9 — fixed in 1.3.9

How to fix

Upgrade to a fixed version: Hometory Co.,Ltd Mangboard commerce package 1.3.9. Check the vendor advisory for mitigations.

References

https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66724
https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66724

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