CVE-2026-96200 in Payments for Hubtel Plugin
Summary
by MITRE • 10/01/2026
The Payments for Hubtel WordPress plugin before 1.0.2 does not verify that payment notifications received by its payment callback come from the payment provider, allowing unauthenticated attackers to mark arbitrary orders as paid without payment.
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Analysis
by VulDB Data Team • 10/01/2026
The vulnerability identified in the Payments for Hubtel WordPress plugin prior to version 1.0.2 represents a critical failure in input validation and authentication mechanisms within the e-commerce workflow. This flaw specifically affects the handling of asynchronous payment notifications, commonly referred to as webhooks or callback requests, which are standard practice in modern digital commerce systems. When a customer initiates a transaction through an integrated third-party payment gateway such as Hubtel, the external provider processes the financial exchange and subsequently sends a notification back to the merchant's website to confirm whether the transaction was successful, failed, or is pending. The core technical deficiency lies in the plugin's inability to cryptographically verify the origin of these incoming requests. Instead of validating digital signatures, checking API keys, or ensuring that the request originates from Hubtel’s known server IP addresses and headers, the software blindly accepts any HTTP POST request claiming to be a payment confirmation. This lack of source verification creates an open channel for manipulation by malicious actors who do not require valid credentials or prior authentication with either WordPress or the payment gateway itself.
From a technical perspective, this issue is classified under CWE-347, which denotes Improper Verification of Cryptographic Signature, although it can also be viewed through the lens of CWE-287, an Improvement in Authentication that fails to properly verify identity before granting access to sensitive state changes. The operational impact of this vulnerability is severe for merchants relying on this plugin for revenue generation. An unauthenticated attacker can craft a simple HTTP request containing parameters that mimic a successful payment notification and send it directly to the vulnerable callback endpoint. Upon receiving this fabricated data, the application updates its internal database status, marking specific orders as paid even though no actual funds have been transferred. This leads to direct financial loss through the shipment of goods or delivery of services without compensation. Furthermore, it compromises the integrity of sales analytics and inventory management systems, which rely on accurate transaction records for operational planning. The ease of exploitation means that automated bots can scan for this endpoint and execute mass fraud attacks with minimal effort, potentially draining merchant resources rapidly if left unpatched.
In terms of threat modeling, this vulnerability aligns with the MITRE ATT&CK technique T1496, which involves Remote Service Availability Impact via resource exhaustion or financial manipulation in e-commerce contexts. It also relates to T1078, Valid Accounts, although in this specific case, no valid account is needed due to the lack of authentication checks on the callback mechanism itself. The attacker effectively bypasses the intended security controls by exploiting the trust relationship between the application and its external partners without establishing that trust properly. This type of flaw is particularly dangerous because it targets a backend process that often runs with elevated privileges or direct database write access, making successful exploitation straightforward for any individual with basic knowledge of HTTP protocols and web request manipulation tools such as curl or Burp Suite.
To mitigate this risk, immediate action must be taken by updating the Payments for Hubtel plugin to version 1.0.2 or later, where these validation checks have presumably been implemented. In scenarios where an update is not immediately feasible, administrators should implement server-side controls to restrict access to the payment callback URL. This can be achieved by configuring web application firewalls (WAFs) or reverse proxies like Nginx or Apache to only accept POST requests from Hubtel’s official IP address ranges and specific user-agent strings associated with their notification service. Additionally, developers should ensure that all future integrations adhere to secure coding standards by implementing HMAC-based signature verification for webhook payloads. This involves generating a shared secret key between the merchant site and the payment provider, where every incoming request must include a cryptographic hash of its contents signed with this key. The server then recalculates the hash using the stored secret and compares it against the received value; if they do not match, the request is rejected. This approach ensures both integrity and authenticity, preventing unauthorized parties from spoofing payment statuses even if they discover the endpoint URL.