Payment Notification Forgery in Robokassa WooCommerce Plugin
CVE-2026-91017

3.7LOW

Key Information:

Vendor

WordPress
Status
Robokassa Payment Gateway For WooCommerce
Vendor
CVE Published:
17 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-91017?

The Robokassa payment gateway for the WooCommerce WordPress plugin, prior to version 1.8.9, contains a flaw that fails to adequately authenticate incoming payment notifications when the non-default deferred-payment feature is enabled. This allows unauthorized attackers to manipulate payment notifications, effectively marking WooCommerce orders as paid or on-hold without any legitimate authorization or valid signature, posing a significant risk to merchants using this plugin.

Affected Version(s)

Robokassa payment gateway for Woocommerce 0 < 1.8.9

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-91017 - Proof of Concept

References

https://wpscan.com/vulnerability/1aeef0b4-9b14-4b03-b7f6-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
3.7
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Pedro Pinho
WPScan
.