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

Quick assessment

Affected

Unknown OPay Payment Gateway for WooCommerce

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WooCommerce WordPress 插件"OPay Payment Gateway"在版本 2.5.5 及更早版本中，未能正确验证支付通知是否确实来自支付提供商。由于用于验证签名的密钥默认设置为空，未经身份验证的攻击者可伪造有效的支付通知，从而将任意订单标记为已支付、已取消或支付失败。

AI Predicted 8.1 Difficulty: Trivial Updated Oct 26, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Updated Oct 26, 2026

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Vulnerability Information

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Vulnerability Title

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

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

N/A

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Unknown	OPay Payment Gateway for WooCommerce	0 ~ 2.5.5	-

II. Public POCs for CVE-2026-103319

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-103319

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Other References for CVE-2026-103319 (1)

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

https://www.cve.org/CVERecord?id=CVE-2026-103319

Same Patch Batch · Unknown · 2026-10-26 · 7 CVEs total

CVE-2026-103300	5.3 MEDIUM	Eurobank WooCommerce Payment Gateway <= 2.1.1 - Unauthenticated Order Payment Forgery via
CVE-2026-111974	5.3 MEDIUM	GiveWP < 4.19.0.1 - Unauthenticated Donation Amount Restriction Bypass via Currency
CVE-2026-103299		nexi Alpha Bank for WooCommerce <= 2.2.0 - Unauthenticated Payment Confirmation Forgery vi
CVE-2026-103381		Mintpay <= 2.2.3 - Unauthenticated Order Payment Completion and Cancellation via Callback
CVE-2026-103298		CCAvenue Payment Gateway for WooCommerce <= 3.1 - Unauthenticated Order Payment Completion
CVE-2026-103306		iKhokha Payment Gateway < 3.0.4 - Unauthenticated Order Payment Forgery via Callback

IV. Related Vulnerabilities

Same vendor: Unknown