CVE-2020-8819
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…
Does this matter?
A public exploit is published in Exploit-DB and the impact is high, while EPSS rates exploitation at 4.9%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
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 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 4.88% probability · 92th percentile
- Public exploits
- 1 in Exploit-DB · first 25 February 2020
- CISA KEV
- Not listed
- Weakness
- CWE-346
- Affected
- cardgate/cardgate payments
- Source
- cve@mitre.org
EPSS 4.9% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.