CVE-2026-84169: CWE-639 Authorization Bypass Through User-Controlled Key in UPI QR Code Payment Gateway
Description
The UPI QR Code Payment Gateway WordPress plugin up to version 1.4.3 contains an authorization bypass vulnerability. This flaw allows unauthenticated attackers to mark arbitrary orders as paid without actually making any payment. The vulnerability arises because the plugin does not verify that a payment-confirmation request belongs to the order and customer it claims to confirm.
Affected software
UPI QR Code Payment Gateway
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-84169 is an authorization bypass vulnerability (CWE-639) in the UPI QR Code Payment Gateway WordPress plugin versions up to and including 1.4.3. The plugin fails to validate that payment-confirmation requests are legitimately associated with the corresponding order and customer. This allows unauthenticated attackers to manipulate the payment status of arbitrary orders, marking them as paid without performing any actual payment transaction.
Potential Impact
An attacker can exploit this vulnerability to fraudulently mark orders as paid, potentially resulting in financial loss for merchants using the plugin. Since no authentication or proper verification is performed, attackers can bypass payment confirmation controls entirely.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling the plugin or restricting access to payment confirmation endpoints if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-09-01T08:18:35.897Z
- State
- PUBLISHED
Threat ID: 6ac3414d2cdf04f656c6fa35
Added to database: 10/05/2026, 06:18:53 UTC
Last enriched: 10/05/2026, 06:33:12 UTC
Last updated: 10/05/2026, 06:33:12 UTC
Views: 4
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