Vulnerability · Published Oct 26, 2026 · Assigned by WPScan

CVE-2026-103319OPay Payment Gateway for WooCommerce <= 2.5.5 - Unauthenticated Payment Confirmation Forgery via Empty Default Secret Key

Medium 5.3

In plain English

A medium-severity improper authentication in OPay Payment Gateway for WooCommerce from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.2%top 92.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The OPay Payment Gateway for WooCommerce WordPress plugin through 2.5.5 does not properly verify that payment notifications originate from the payment provider, as the secret used to validate their signature is empty by default, allowing unauthenticated attackers to forge a valid notification and mark arbitrary orders as paid, cancelled or failed.

Affected products (as reported)

Vendor	Product	Versions
Unknown	OPay Payment Gateway for WooCommerce	0 – through 2.5.5

Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

https://wpscan.com/vulnerability/c07f15a0-3c15-429f-bcde-1511ad658c6c/ exploit, vdb-entry, technical-description