CVE-2025-53295 is a Missing Authorization vulnerability (CWE-862) identified in the iCount Payment Gateway product, affecting versions up to 2.0.6. This vulnerability arises because certain functionalities within the payment gateway are not properly constrained by Access Control Lists (ACLs), allowing unauthorized users to access or invoke functions that should be restricted. The vulnerability does not require authentication (PR:N) or user interaction (UI:N), and can be exploited remotely over the network (AV:N) with low attack complexity (AC:L). According to the CVSS v3.1 vector, the impact is limited to integrity (I:L) with no impact on confidentiality (C:N) or availability (A:N). This means an attacker could potentially manipulate or alter data or transactions within the payment gateway without proper authorization, but cannot directly access sensitive data or disrupt service availability. No known exploits are currently reported in the wild, and no patches or fixes have been linked yet. The vulnerability was publicly disclosed on June 27, 2025. The iCount Payment Gateway is a financial transaction processing system used by businesses to handle payments, thus any unauthorized manipulation could lead to fraudulent transactions, financial discrepancies, or loss of trust in payment processing integrity.

For European organizations using the iCount Payment Gateway, this vulnerability poses a risk of unauthorized transaction manipulation or alteration, potentially leading to financial losses, compliance violations (e.g., PSD2 requirements), and reputational damage. Since the vulnerability allows unauthorized access to functionality without authentication, attackers could exploit it to bypass internal controls and perform unauthorized operations such as modifying payment details or transaction states. This could undermine the integrity of financial data and transaction records, complicating audit trails and regulatory compliance. Organizations in sectors with high transaction volumes or strict regulatory oversight, such as banking, e-commerce, and financial services, are particularly vulnerable. The lack of confidentiality and availability impact reduces the risk of data leakage or service disruption, but the integrity compromise alone is significant in financial contexts. Additionally, the absence of known exploits provides a window for proactive mitigation before active exploitation occurs.

1. Immediate mitigation should focus on implementing strict access control checks on all sensitive functions within the iCount Payment Gateway, ensuring that only authorized roles can invoke these functions. 2. Conduct a thorough code review and security audit of the payment gateway’s ACL implementation to identify and remediate any missing or improperly configured authorization checks. 3. Employ network segmentation and firewall rules to restrict access to the payment gateway interfaces only to trusted internal systems and authenticated users. 4. Monitor transaction logs and system activity for unusual or unauthorized function calls that could indicate exploitation attempts. 5. Engage with the vendor (iCount) to obtain patches or updates as soon as they become available and apply them promptly. 6. Implement compensating controls such as multi-factor authentication for administrative access and transaction verification workflows to detect and prevent unauthorized changes. 7. Regularly update and test incident response plans to quickly identify and respond to any exploitation attempts related to this vulnerability.