CVE-2021-39308: WooCommerce myghpay Payment Gateway <= 3.0 Reflected Cross-Site Scripting

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-14 · updated 2026-06-17
Weakness: CWE-79

Description

The WooCommerce myghpay Payment Gateway WordPess plugin is vulnerable to Reflected Cross-Site Scripting via the clientref parameter found in the ~/processresponse.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 3.0.

Affected products

WooCommerce myghpay Payment Gateway: through 3.0

References

https://plugins.trac.wordpress.org/browser/woo-myghpay-payment-gateway/trunk/processresponse.php?rev=2410420#L134
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39308
https://plugins.trac.wordpress.org/browser/woo-myghpay-payment-gateway/trunk/processresponse.php?rev=2410420#L134
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39308

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