CVE-2020-8819

HIGH

CardGate Payments <3.1.15 - Auth Bypass

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-8819. PoCs published by GeekHack.

AI-analyzed exploit summary This exploit leverages a lack of origin authentication in the WooCommerce CardGate Payment Gateway plugin to replace critical settings (merchant ID, secret key) via IPN callback manipulation, allowing payment process bypass or redirection of payments.

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.

Exploits (1)

exploitdb WORKING POC
by GeekHack · phpwebappsphp
https://www.exploit-db.com/exploits/48134

This exploit leverages a lack of origin authentication in the WooCommerce CardGate Payment Gateway plugin to replace critical settings (merchant ID, secret key) via IPN callback manipulation, allowing payment process bypass or redirection of payments.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: WordPress Plugin WooCommerce CardGate Payment Gateway <= 3.1.15
No auth needed
Prerequisites: Publicly accessible target · CardGate merchant account · Ability to host the exploit script
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/cardgate/woocommerce/issues/18
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/48134
Third Party Advisory x_refsource_misc
https://wpvulndb.com/vulnerabilities/10097

Scores

CVSS v3 8.1
EPSS 0.0454
EPSS Percentile 90.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Details

CWE
CWE-346
Status published
Products (2)
cardgate/cardgate_payments < 3.1.15
cardgate/woocommerce 0 - 3.1.16Packagist
Published Feb 25, 2020
Tracked Since Feb 18, 2026