Origin validation error in CardGate Payments for WooCommerce - CVE-2020-8819

Vulnerability identifier: #VU25673

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-8819

CWE-ID: CWE-346

Exploitation vector: Remote access

Exploit availability: Public exploit is available

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to a lack of origin authentication at IPN callback processing function. A remote attacker can replace critical plugin settings (merchant id, secret key etc) with known to him and therefore bypass payment process (eg. spoof order status by manually sending IPN callback request with a valid signature but without real payment) and/or receive all subsequent payments (on behalf of the store).

CardGate Payments for WooCommerce

Install updates from vendor's website.

CardGate Payments for WooCommerce - update to 3.1.16

• Exploit #5763 - WordPress Plugin WooCommerce CardGate Payment Gateway 3.1.15 - Payment Process Bypass (June 17, 2021)

• http://packetstormsecurity.com/files/156504/WordPress-WooCommerce-CardGate-Payment-Gateway-3.1.15-Bypass.html
• https://github.com/cardgate/woocommerce/blob/f2111af7b1a3fd701c1c5916137f3ac09482feeb/cardgate/cardgate.php#L426-L442
• https://github.com/cardgate/woocommerce/issues/18
• https://wpvulndb.com/vulnerabilities/10097
• https://www.exploit-db.com/exploits/48134

• Origin validation error in CardGate Payments for WooCommerce plugin for WordPress