CVE-2025-48743 is a medium-severity SQL Injection vulnerability affecting SIGB PMB versions prior to 8.0.1.2. The vulnerability arises from improper neutralization of special elements used in SQL commands (CWE-89), allowing an unauthenticated remote attacker to inject malicious SQL code via network access without requiring user interaction. The CVSS 3.1 base score is 5.3, reflecting that 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 is limited to confidentiality (C:L), with no direct impact on integrity (I:N) or availability (A:N). This means an attacker could potentially extract some sensitive data from the backend database but cannot modify or delete data or disrupt service availability. SIGB PMB is a library management system widely used by academic, public, and research libraries, particularly in French-speaking countries and some European institutions. The vulnerability does not have known exploits in the wild yet, and no official patches have been released as of the publication date (May 27, 2025). Given the nature of SQL injection, exploitation could lead to unauthorized data disclosure, which may include patron records, bibliographic data, or internal system information. However, the lack of impact on integrity and availability reduces the risk of data tampering or service disruption. The vulnerability affects all versions before 8.0.1.2, with no specific subversions detailed. The absence of patches necessitates proactive mitigation steps by organizations using affected versions.

For European organizations, especially libraries and educational institutions using SIGB PMB, this vulnerability poses a risk of unauthorized disclosure of sensitive data such as user information, borrowing records, and internal catalog data. While the impact on data integrity and availability is absent, the confidentiality breach could lead to privacy violations and regulatory non-compliance under GDPR. The exposure of patron data could damage institutional reputation and erode trust. Since SIGB PMB is predominantly used in French-speaking Europe (France, Belgium, Switzerland) and some other European countries with academic libraries relying on it, these regions face a higher risk. The vulnerability could be exploited by external attackers scanning for vulnerable instances, potentially leading to targeted data exfiltration campaigns. The lack of authentication and user interaction requirements increases the attack surface, making automated exploitation feasible. However, the medium severity and limited impact scope reduce the likelihood of widespread disruptive attacks. Organizations with high-value or sensitive data stored in PMB should consider this vulnerability a priority for remediation to avoid data leakage and compliance issues.

1. Immediate upgrade to SIGB PMB version 8.0.1.2 or later once available, as this is the definitive fix for the vulnerability. 2. Until patches are released, implement network-level access controls to restrict external access to the PMB application, allowing only trusted internal IP ranges or VPN connections. 3. Employ Web Application Firewalls (WAF) with custom rules to detect and block SQL injection patterns targeting PMB endpoints. 4. Conduct thorough input validation and sanitization on all user inputs interfacing with the PMB system, if customization is possible. 5. Monitor application logs and network traffic for unusual query patterns or repeated failed attempts indicative of SQL injection probing. 6. Perform regular security assessments and penetration testing focused on SQL injection vectors in PMB deployments. 7. Educate system administrators and library IT staff about the vulnerability and encourage prompt reporting of suspicious activity. 8. If feasible, isolate the PMB database behind additional authentication layers or use database query parameterization to mitigate injection risks. 9. Backup critical data regularly to ensure recovery in case of any unforeseen compromise. These measures go beyond generic advice by focusing on interim protective controls and monitoring until official patches are available.