CVE-2025-7815 is a cross-site scripting (XSS) vulnerability identified in version 1.0 of the PHPGurukul Apartment Visitors Management System. The vulnerability arises from improper handling of the 'visname' parameter in the /manage-newvisitors.php file, which processes HTTP POST requests. An attacker can manipulate this parameter to inject malicious scripts that execute in the context of the victim's browser. This type of vulnerability enables attackers to perform actions such as session hijacking, defacement, or redirecting users to malicious sites. The vulnerability is remotely exploitable without authentication but requires user interaction to trigger the malicious payload, such as an administrator or user viewing a crafted page or input. The CVSS 4.0 base score is 4.8, indicating a medium severity level. The vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:H indicates high privileges required, but this conflicts with the description; assuming PR:H means privileges required), user interaction required (UI:P), and limited impact on confidentiality and integrity. No known exploits are currently in the wild, and no patches have been published yet. Other parameters may also be vulnerable, suggesting a broader input validation issue in the application. Given the nature of the system—managing visitor information in apartment complexes—the vulnerability could expose sensitive personal data or allow attackers to manipulate visitor logs or notifications.

For European organizations, particularly property management companies and residential complexes using the PHPGurukul Apartment Visitors Management System, this vulnerability could lead to unauthorized script execution in administrative or user interfaces. This may result in theft of session cookies, unauthorized access to visitor data, or manipulation of visitor records, undermining the integrity and confidentiality of resident and visitor information. Such breaches could violate GDPR requirements concerning personal data protection, leading to regulatory penalties and reputational damage. Additionally, attackers could use the XSS vulnerability as a foothold to conduct further attacks within the network, potentially escalating privileges or distributing malware. The impact is heightened in environments where visitor management systems are integrated with broader building management or security systems, increasing the risk of physical security breaches.

Organizations should immediately review and sanitize all user inputs, especially the 'visname' parameter and other related inputs in /manage-newvisitors.php, to prevent script injection. Implementing strict input validation and output encoding is essential. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Since no official patches are available, organizations should consider temporary workarounds such as disabling the vulnerable functionality or restricting access to the affected module to trusted users only. Conduct thorough code audits of the visitor management system to identify and remediate similar input validation issues. Monitoring web server logs for suspicious POST requests targeting /manage-newvisitors.php can help detect exploitation attempts. Finally, ensure that all users are educated about the risks of clicking on untrusted links or inputs that could trigger XSS payloads.