CVE-2020-8819: cardgate cardgate_payments Origin Validation Error
Vulnerability summary
CVE-2020-8819 is a high (CVSS 8.1) Origin Validation Error vulnerability in cardgate cardgate_payments. EPSS estimates a 4.88% chance of exploitation in the next 30 days, higher than 92% of scored vulnerabilities. 3 public exploits are recorded. Fixed in 3.1.16.
Timeline
- 25-02-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 2 sources · 2 versions- wordfenceSource8.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS trend
Probability
4.88%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
0.00 pp
From 4.88% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
3 foundWoocommerce
Maturity: poc
Exploit Reference (packetstormsecurity.com)
Maturity: unknown
WordPress Plugin WooCommerce CardGate Payment Gateway 3.1.15 - Payment Process Bypass
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Cardgate1 product
- cardgate_payments≤ 3.1.15
Wordpress1 product
- cardgate< 3.1.16
2 vendors · 2 products
References
6 links- github.com/cardgate/woocommerce/blob/f2111af7b1a3fd701c1c5916137f3ac09482feeb/cardgate/cardgate.phpX Refsource MISCExploitThird Party Advisory