CVE-2020-8818
CVSS v3
8.1
HIGH
EPSS Score
4.2 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An issue was discovered in the CardGate Payments plugin through 2.0.30 for Magento 2. Lack of origin authentication in the IPN callback processing function in Controller/Payment/Callback.php allows an attacker to remotely replace critical plugin settings (merchant ID, secret key, etc.) and therefore bypass the payment process (e.g., spoof an order status by manually sending an IPN callback request with a valid signature but without real payment) and/or receive all of the subsequent payments.
Technical details
- Published
- 2020-02-25
Frequently asked questions
What is CVE-2020-8818?
An issue was discovered in the CardGate Payments plugin through 2.0.30 for Magento 2. Lack of origin authentication in the IPN callback processing function in Controller/Payment/Callback.php allows an attacker to remotely replace critical plugin settings (merchant ID, secret key, etc.) and therefore bypass the payment process (e.g., spoof an order status by manually sending an IPN callback request with a valid signature but without real payment) and/or receive all of the subsequent payments.
Is CVE-2020-8818 actively exploited?
Active exploitation of CVE-2020-8818 has not been confirmed. Its EPSS score was 4.2% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-8818?
CVE-2020-8818 has a CVSS v3 base score of 8.1 (HIGH severity).
Is CVE-2020-8818 affecting your environment?
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