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Public proof of conceptFix available

CVE-2020-8819

A public proof of concept exists; no exploitation attested.

  • Published2020-02-25
  • Fixed in3.1.16
  • WeaknessCWE-346

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2020-02-25Exploit-DB entryExploit-DB

Versions per branch

OSV · NVD
cardgate/woocommerce
BranchAffectedFixed in
3.1< 3.1.163.1.16
Cardgate cardgate payments
BranchAffectedFixed in
3.1≤ 3.1.15no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update cardgate/woocommerce to 3.1.16

Detection

read 2026-11-09 09:28 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-48134
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
2020-02-25
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-5pq5-9phv-q5j3

Frequently asked questions

What is CVE-2020-8819?

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.

Is CVE-2020-8819 actively exploited?

Active exploitation of CVE-2020-8819 has not been confirmed. Its EPSS score was 4.9% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-8819?

CVE-2020-8819 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

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