CVE-2020-8819
CardGate Payments plugin for WooCommerce does not validate request origin
An issue was discovered in the CardGate Payments plugin through 3.1.15 for WooCommerce. Lack of origin authentication in the IPN callback processing function in cardgate/cardgate.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 3.1.15 for WooCommerce. Lack of origin authentication in the IPN callback processing function in cardgate/cardgate.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-2020-8819- 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 3.1.15 for WooCommerce. Lack of origin authentication in the IPN callback processing function in cardgate/cardgate.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-2020-8819- Updated
- 2026-11-02
EUVDEUVD-2022-2632 No score
An issue was discovered in the CardGate Payments plugin through 3.1.15 for WooCommerce. Lack of origin authentication in the IPN callback processing function in cardgate/cardgate.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-2022-2632- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5pq5-9phv-q5j3
8.1
CardGate Payments plugin for WooCommerce does not validate request origin
An issue was discovered in the CardGate Payments plugin through 3.1.15 for WooCommerce. Lack of origin authentication in the IPN callback processing function in cardgate/cardgate.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-5pq5-9phv-q5j3- 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 3.1.15 for WooCommerce. Lack of origin authentication in the IPN callback processing function in cardgate/cardgate.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-2020-8819- 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-5pq5-9phv-q5j3
8.1
CardGate Payments plugin for WooCommerce does not validate request origin
An issue was discovered in the CardGate Payments plugin through 3.1.15 for WooCommerce. Lack of origin authentication in the IPN callback processing function in cardgate/cardgate.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-5pq5-9phv-q5j3- 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/woocommercePackagist |
through 3.1.15 | 3.1.16 |
cardgate/woocommercePackagist |
before 3.1.16 | 3.1.16 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | WordPress Plugin WooCommerce CardGate Payment Gateway 3.1.15 - Payment Process Bypass | 2020-02-25 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-8819 is a high vulnerability (CVSS 8.1) in Cardgate Payments, published February 25, 2020. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 4.88%, the 92nd percentile. Fixed in cardgate/woocommerce 3.1.16.
References
github.com/cardgate/woocommerce/blob/f2111af7b1a3fd701c1c5916137f3ac09482feeb/cardgate/cardgate.php
github.com/cardgate/woocommerce/issues/18
packetstormsecurity.com/files/156504/WordPress-WooCommerce-CardGate-Payment-Gateway-3.1.15-Bypass.html
exploit-db.com/exploits/48134
wpvulndb.com/vulnerabilities/10097
nvd.nist.gov/vuln/detail/CVE-2020-8819
github.com/cardgate/woocommerce/pull/17/commits/0b83588d604c8c56c7fded43144fcced96b2ada9
github.com/advisories/GHSA-5pq5-9phv-q5j3
github.com/cardgate/woocommerce