CVE-2025-7535 is a SQL Injection vulnerability identified in version 1.0 of the Campcodes Sales and Inventory System, specifically within the /pages/reprint_cash.php file. The vulnerability arises from improper sanitization or validation of the 'sid' parameter, which can be manipulated by an attacker to inject malicious SQL code. This injection flaw allows an unauthenticated remote attacker to execute arbitrary SQL queries against the backend database without requiring any user interaction or privileges. The vulnerability is classified as critical by the vendor, although the CVSS 4.0 score is 6.9 (medium severity), reflecting a balance between ease of exploitation and impact. The attack vector is network-based (AV:N), with low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The impact on confidentiality, integrity, and availability is limited (VC:L, VI:L, VA:L), indicating that while the attacker can potentially read, modify, or delete some data, the scope and severity of these impacts are somewhat constrained. The vulnerability does not affect system components beyond the database layer (SC:N), and the exploit code has been publicly disclosed, increasing the risk of exploitation. No patches or mitigation links have been provided yet, and no known exploits are currently active in the wild. The vulnerability affects only version 1.0 of the product, which may limit exposure if organizations have upgraded or use different versions.

For European organizations using Campcodes Sales and Inventory System 1.0, this vulnerability poses a significant risk to the confidentiality and integrity of their sales and inventory data. An attacker exploiting this flaw could access sensitive business information, manipulate inventory records, or disrupt sales operations by altering or deleting data. This could lead to financial losses, operational disruptions, and reputational damage. Given that the attack requires no authentication and can be launched remotely, organizations with internet-facing deployments of this system are particularly vulnerable. The medium CVSS score suggests that while the impact is serious, it may not result in full system compromise or widespread availability loss. However, the public disclosure of the exploit increases the urgency for European organizations to assess their exposure and implement mitigations promptly. The vulnerability could also be leveraged as a foothold for further attacks within the network if combined with other vulnerabilities or misconfigurations.

European organizations should immediately audit their use of Campcodes Sales and Inventory System to determine if version 1.0 is deployed, especially in internet-accessible environments. In the absence of an official patch, organizations should implement the following mitigations: 1) Apply Web Application Firewall (WAF) rules specifically designed to detect and block SQL injection attempts targeting the 'sid' parameter in /pages/reprint_cash.php. 2) Employ input validation and parameterized queries or prepared statements if source code access is available, to sanitize the 'sid' parameter. 3) Restrict access to the vulnerable endpoint by IP whitelisting or network segmentation to limit exposure. 4) Monitor logs for suspicious SQL query patterns or repeated access attempts to the affected page. 5) Consider deploying database activity monitoring tools to detect anomalous queries. 6) Plan for an upgrade or patch deployment as soon as the vendor releases a fix. 7) Conduct security awareness training for IT staff to recognize exploitation signs and respond swiftly. These targeted mitigations go beyond generic advice by focusing on the specific vulnerable parameter and endpoint, leveraging network controls, and enhancing detection capabilities.