CVE-2025-26535 identifies a Blind SQL Injection vulnerability in the CodeSolz Bitcoin / AltCoin Payment Gateway plugin for WooCommerce, specifically affecting all versions up to and including 1.7.6. The vulnerability arises from improper neutralization of special characters in SQL commands, allowing attackers to inject arbitrary SQL code into database queries. Blind SQL Injection means attackers cannot directly see query results but can infer data by observing application behavior or response times. This flaw can be exploited remotely by sending specially crafted requests to the plugin's interfaces that interact with the database, potentially exposing sensitive information such as user data, transaction records, or administrative credentials. The plugin is widely used in WooCommerce environments to facilitate cryptocurrency payments, making it a critical component in e-commerce infrastructures that accept Bitcoin and altcoins. Although no public exploits have been reported yet, the vulnerability's presence in a payment gateway plugin increases the risk profile, as attackers may target financial data or disrupt payment processing. The lack of a CVSS score indicates this is a newly disclosed issue, but the technical details confirm a serious security weakness. The vulnerability does not require user interaction but may require the attacker to send malicious HTTP requests to the affected WooCommerce installation. The plugin's market penetration and the increasing use of cryptocurrency payments in e-commerce amplify the potential impact of this vulnerability.

The impact of CVE-2025-26535 is significant for organizations using the affected CodeSolz Bitcoin / AltCoin Payment Gateway plugin. Successful exploitation can lead to unauthorized disclosure of sensitive customer and transaction data, undermining confidentiality. Attackers may also manipulate database contents, affecting data integrity and potentially causing financial discrepancies or fraudulent transactions. The availability of the payment gateway could be disrupted if attackers execute commands that degrade or crash the database service. Given the plugin's role in processing cryptocurrency payments, exploitation could result in financial losses, reputational damage, and regulatory compliance issues for affected businesses. The blind nature of the SQL injection complicates detection but does not reduce the severity, as attackers can still extract valuable information or escalate attacks. Organizations worldwide that rely on WooCommerce for e-commerce and use this plugin are at risk, especially those with high transaction volumes or sensitive customer data. The absence of known exploits in the wild provides a window for remediation but also means attackers may develop exploits soon after disclosure.

To mitigate CVE-2025-26535, organizations should immediately update the CodeSolz Bitcoin / AltCoin Payment Gateway plugin to a version that patches this vulnerability once available. Until a patch is released, apply the following specific measures: 1) Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the plugin's endpoints, focusing on blind injection techniques. 2) Restrict access to the WooCommerce admin and plugin interfaces using IP whitelisting or VPNs to limit exposure to trusted users only. 3) Conduct thorough input validation and sanitization on all user-supplied data interacting with the payment gateway, employing parameterized queries or prepared statements if custom code is used. 4) Monitor database logs and application behavior for anomalies indicative of SQL injection attempts, such as unusual query patterns or response delays. 5) Regularly back up databases and test restoration procedures to minimize impact in case of data corruption. 6) Educate development and security teams about the risks of SQL injection and ensure secure coding practices are followed in all customizations. These targeted actions will reduce the attack surface and improve detection until an official patch is applied.