CVE-2026-3616 is a SQL injection vulnerability discovered in DefaultFuction Jeson Customer Relationship Management System version 1.0.0. The vulnerability resides in the /modules/customers/edit.php file, specifically in an unknown function that processes the 'ID' parameter. By manipulating this parameter, an attacker can inject malicious SQL code, potentially allowing unauthorized access to or modification of the underlying database. The attack vector is remote network access without requiring authentication or user interaction, increasing the risk of exploitation. The vulnerability affects the confidentiality, integrity, and availability of the CRM data, as attackers could extract sensitive customer information, alter records, or disrupt service. The CVSS 4.0 base score is 5.3 (medium severity), reflecting the ease of exploitation and the moderate impact. Although no exploits are currently observed in the wild, a public exploit is available, raising the urgency for patching. The vendor has released a patch identified by commit f0e991870e9d33701cca3a1d0fd4eec135af01a6, which addresses the issue by properly sanitizing or parameterizing the input to prevent SQL injection. Organizations using this CRM should prioritize applying this patch and review their systems for signs of compromise.

The SQL injection vulnerability allows remote attackers to execute arbitrary SQL commands on the backend database without authentication, potentially leading to unauthorized data disclosure, data manipulation, or denial of service. Confidential customer data stored in the CRM could be exposed or altered, undermining trust and compliance with data protection regulations. Attackers could also disrupt CRM operations, affecting business continuity. The medium severity rating indicates a moderate risk, but the availability of a public exploit increases the likelihood of attacks. Organizations relying on this CRM system face risks of data breaches, reputational damage, and operational disruptions if unpatched. The vulnerability could be leveraged as an initial foothold for further network compromise, especially if the CRM is integrated with other critical systems.

1. Immediately apply the official patch identified by commit f0e991870e9d33701cca3a1d0fd4eec135af01a6 to all affected Jeson CRM 1.0.0 instances. 2. If patching is temporarily not possible, implement web application firewall (WAF) rules to detect and block SQL injection attempts targeting the 'ID' parameter in /modules/customers/edit.php. 3. Conduct thorough input validation and parameterized queries in all custom code interacting with the database to prevent injection flaws. 4. Perform security audits and penetration testing focused on injection vulnerabilities in the CRM environment. 5. Monitor logs for suspicious database queries or unusual access patterns indicative of exploitation attempts. 6. Restrict network access to the CRM system to trusted IPs and enforce least privilege principles on database accounts used by the CRM. 7. Educate development and operations teams on secure coding practices to avoid similar vulnerabilities in future releases.