CVE-2021-20750

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-28 · updated 2026-06-17
Weakness: CWE-79

Description

Cross-site scripting vulnerability in EC-CUBE EC-CUBE 3.0.0 to 3.0.18-p2 (EC-CUBE 3 series) and EC-CUBE 4.0.0 to 4.0.5-p1 (EC-CUBE 4 series) allows a remote attacker to inject an arbitrary script by leading an administrator or a user to a specially crafted page and to perform a specific operation.

Affected products

EC-CUBE CO.,LTD. EC-CUBE: from 3.0.0 before 3.0.18; from 4.0.0 before 4.0.5; 3.0.18, 3.0.18-p1, 4.0.5 — fixed in 3.0.18, 4.0.5

How to fix

Upgrade to a fixed version: EC-CUBE CO.,LTD. EC-CUBE 3.0.18, 4.0.5. Check the vendor advisory for mitigations.

References

https://jvn.jp/en/jp/JVN95292458/index.html
https://www.ec-cube.net/info/weakness/weakness.php?id=78
https://www.ec-cube.net/info/weakness/weakness.php?id=79
https://jvn.jp/en/jp/JVN95292458/index.html
https://www.ec-cube.net/info/weakness/weakness.php?id=78
https://www.ec-cube.net/info/weakness/weakness.php?id=79

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