CVE-2025-4927 is a SQL Injection vulnerability identified in version 1.0 of the PHPGurukul Online Marriage Registration System. The flaw exists in the /admin/between-dates-application-report.php script, specifically in the handling of the 'fromdate' and 'todate' parameters. These parameters are used to filter or query marriage registration data between specified dates. Due to insufficient input validation or improper sanitization, an attacker can manipulate these parameters to inject arbitrary SQL code. This injection can be executed remotely without any authentication or user interaction, making it highly accessible to attackers. The vulnerability allows an adversary to execute unauthorized SQL commands on the backend database, potentially leading to unauthorized data disclosure, modification, or deletion. The CVSS 4.0 base score is 6.9, categorized as medium severity, reflecting the lack of authentication requirement and ease of exploitation but limited scope and impact on confidentiality, integrity, and availability. Although no known exploits are currently observed in the wild, the public disclosure of the vulnerability increases the risk of exploitation. The absence of patches or mitigation links indicates that the vendor has not yet released an official fix, increasing the urgency for organizations to apply compensating controls or mitigations.

For European organizations using the PHPGurukul Online Marriage Registration System, this vulnerability poses significant risks. Marriage registration systems typically contain sensitive personal data, including identities, dates, and legal statuses, which are protected under GDPR and other privacy regulations. Exploitation could lead to unauthorized access to personal data, violating privacy laws and resulting in legal and reputational damage. Additionally, attackers could alter or delete records, undermining the integrity of official civil status data, which could have cascading effects on legal processes and citizen services. The remote and unauthenticated nature of the attack vector increases the likelihood of exploitation, especially if the system is exposed to the internet without adequate network protections. Although the CVSS score is medium, the criticality of the data involved elevates the potential impact. European public sector entities or municipalities using this system are particularly at risk, as they are custodians of sensitive citizen data and are subject to strict compliance requirements.

Given the lack of an official patch, European organizations should immediately implement the following mitigations: 1) Employ Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting the 'fromdate' and 'todate' parameters. 2) Restrict access to the /admin/between-dates-application-report.php endpoint by IP whitelisting or VPN-only access to reduce exposure. 3) Conduct thorough input validation and sanitization on all date parameters at the application or proxy level, enforcing strict date format checks and rejecting suspicious input patterns. 4) Monitor database logs and web server logs for unusual query patterns or error messages indicative of injection attempts. 5) Isolate the affected system within the network to limit lateral movement in case of compromise. 6) Plan and prioritize upgrading or patching the system once an official fix is released by the vendor. 7) Conduct regular security assessments and penetration tests focusing on injection vulnerabilities in critical applications. These targeted measures go beyond generic advice by focusing on the specific vulnerable parameters and access controls relevant to this system.