CVE-2026-103319
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductOPay Payment Gateway for WooCommerce
PublishedOct 26, 2026
First seenOct 26, 2026
Weakness typeCWE-287Improper authentication
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| OPay Payment Gateway for WooCommerce | v ≤ 2.5.5 | — |
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