CVE-2020-8819

Name: CVE-2020-8819
Creator: NVD / NIST
Published: 2020-02-25T02:15:12.16+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 4.54%

Last modified Jun 17, 2026

CVE-2020-8819 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 4.54% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

4.54%

90.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-346

Affected Software

Vendor	Product	Versions
Cardgate	Cardgate Payments	<= 3.1.15

References

http://packetstormsecurity.com/files/156504/WordPress-WooCommerce-CardGate-Payment-Gateway-3.1.15-Bypass.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/cardgate/woocommerce/blob/f2111af7b1a3fd701c1c5916137f3ac09482feeb/cardgate/cardgate.php#L426-L442Exploit, Third Party Advisory
https://github.com/cardgate/woocommerce/issues/18Exploit, Third Party Advisory
https://wpvulndb.com/vulnerabilities/10097Third Party Advisory
https://www.exploit-db.com/exploits/48134Exploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/156504/WordPress-WooCommerce-CardGate-Payment-Gateway-3.1.15-Bypass.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/cardgate/woocommerce/blob/f2111af7b1a3fd701c1c5916137f3ac09482feeb/cardgate/cardgate.php#L426-L442Exploit, Third Party Advisory
https://github.com/cardgate/woocommerce/issues/18Exploit, Third Party Advisory
https://wpvulndb.com/vulnerabilities/10097Third Party Advisory
https://www.exploit-db.com/exploits/48134Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Feb 25, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8819?

How severe is CVE-2020-8819?

CVE-2020-8819 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 4.54% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8819?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-8819?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST