CVE-2026-103302 in Payment Gateway for Idram Plugin
Summary
by MITRE • 10/22/2026
The Payment Gateway for Idram WordPress plugin before 2.1.6 does not verify the authenticity of incoming payment notifications, because the merchant credentials used to compute their checksum are empty by default, allowing unauthenticated attackers to forge a valid payment confirmation and mark arbitrary orders as paid, and to force arbitrary orders into a failed state regardless of the gateway's configuration.
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Analysis
by VulDB Data Team • 10/22/2026
The vulnerability identified in versions of the Payment Gateway for Idram WordPress plugin prior to 2.1.6 represents a critical failure in authentication logic within an e-commerce environment. The core technical flaw stems from how the plugin handles incoming payment notifications, specifically regarding the verification of message integrity and origin. When a third-party payment processor sends a notification back to the merchant's website to confirm that a transaction has been completed or failed, the receiving application must validate this data to ensure it was not tampered with during transit and actually originated from the legitimate payment gateway. In this specific implementation, the plugin relies on merchant credentials to compute a cryptographic checksum for these notifications. However, because these credentials are initialized as empty strings by default upon installation or configuration errors, the resulting checksum calculation becomes deterministic and predictable rather than secure. This effectively nullifies any integrity protection mechanism intended to safeguard against spoofing attacks.
From an operational perspective, this flaw allows unauthenticated attackers to forge valid payment confirmations without possessing any secret keys or credentials associated with the merchant account. By crafting a request that mimics the structure of a legitimate notification and appending a forged checksum based on empty inputs, an attacker can trick the WordPress site into believing that a transaction was successfully processed by Idram when it never occurred. This leads to direct financial loss as orders are marked as paid in the system while no actual funds have been transferred. Furthermore, the vulnerability extends beyond simple fraud; attackers can also manipulate the state of arbitrary orders to force them into a failed status. This capability disrupts business operations and inventory management by incorrectly marking valid transactions as unsuccessful, potentially leading to customer dissatisfaction and logistical errors such as double shipping or stock discrepancies if not manually corrected.
This type of vulnerability is classically categorized under CWE-347, which describes Improper Verification of Cryptographic Signature. The root cause lies in the assumption that default configurations provide sufficient security boundaries, ignoring the reality that empty secrets render cryptographic protections inert. In terms of adversary behavior as defined by the MITRE ATT&CK framework, this flaw facilitates techniques associated with T1589, specifically Credential Access or Collection, although in this case, no actual credentials are stolen because none exist for verification purposes. More accurately, it aligns with T1496, Resource Hijacking, where resources (in this context, the integrity of order data and financial records) are exploited for malicious gain. The attack vector is typically remote and requires low complexity, as it does not necessitate user interaction or prior authentication to exploit the logic flaw in the notification handler.
Mitigation strategies must address both immediate remediation and long-term security hygiene. The primary solution is to upgrade the plugin to version 2.1.6 or later, where this validation logic has been corrected to ensure that non-empty, securely generated credentials are mandatory for checksum verification. Administrators who cannot immediately update should manually verify their configuration settings to ensure merchant IDs and secret keys are correctly populated in the database before accepting any payment notifications. Additionally, implementing server-side logging of all incoming webhook requests can aid in detecting anomalous patterns indicative of such forgery attempts. It is also advisable to review other plugins handling financial transactions for similar weaknesses, ensuring that default configurations never bypass security checks and that cryptographic operations always rely on robust, non-empty secrets. Regular audits of third-party code dependencies are essential to maintain the integrity of e-commerce platforms against these types of logic-based exploits.