CVE-2020-8818
Origin Validation Error in Magento 2
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
8.1
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.
- Record
CVE-2020-8818- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - CVSS 2.0
- 5.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2020-8818- Updated
- 2026-11-02
EUVDEUVD-2021-2249 No score
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.
- Record
EUVD-2021-2249- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qf6q-qfwp-vp44
8.1
Origin Validation Error in Magento 2
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.
- Record
GHSA-qf6q-qfwp-vp44- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
OSV
8.1
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.
- Record
CVE-2020-8818- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-qf6q-qfwp-vp44
8.1
Origin Validation Error in Magento 2
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.
- Record
GHSA-qf6q-qfwp-vp44- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
cardgate/magento2Packagist |
before 2.0.33 | 2.0.33 |
cardgate/magento2Packagist |
before 2.0.33, plus listed versions 2.0.12.0.102.0.112.0.132.0.14 Show 26 moreShow less2.0.152.0.162.0.172.0.182.0.192.0.22.0.202.0.212.0.222.0.232.0.242.0.252.0.262.0.272.0.282.0.32.0.302.0.312.0.322.0.42.0.52.0.62.0.72.0.82.0.9v2.0.29 |
2.0.33 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-8818 is a high vulnerability (CVSS 8.1) in Adobe Magento, published February 25, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.17%, the 90th percentile. Fixed in cardgate/magento2 2.0.33.
References
github.com/cardgate/magento2/blob/715979e54e1a335d78a8c5586f9e9987c3bf94fd/Controller/Payment/Callback.php
github.com/cardgate/magento2/issues/54
packetstormsecurity.com/files/156505/Magento-WooCommerce-CardGate-Payment-Gateway-2.0.30-Bypass.html
nvd.nist.gov/vuln/detail/CVE-2020-8818
github.com/cardgate/magento2/releases/tag/v2.0.33
github.com/advisories/GHSA-qf6q-qfwp-vp44
github.com/cardgate/magento2