CVE-2025-7857 is a cross-site scripting (XSS) vulnerability identified in version 1.0 of the PHPGurukul Apartment Visitors Management System. The vulnerability exists in the HTTP POST request handler within the file bwdates-passreports-details.php. Specifically, the issue arises from improper sanitization or validation of the 'visname' parameter, which can be manipulated by an attacker to inject malicious scripts. When exploited, this XSS vulnerability allows an attacker to execute arbitrary JavaScript code in the context of the victim's browser session. This can lead to session hijacking, defacement, or redirection to malicious sites. The vulnerability is remotely exploitable without requiring authentication, but user interaction is necessary for the malicious script to execute (e.g., a user must visit a crafted page or submit a manipulated form). The CVSS v4.0 base score is 5.1, indicating a medium severity level. The attack complexity is low, and no privileges are required, but user interaction is needed. No known exploits are currently reported in the wild, and no patches have been published yet. The disclosure date is July 19, 2025.

For European organizations using the PHPGurukul Apartment Visitors Management System version 1.0, this vulnerability poses a moderate risk. Exploitation could compromise the confidentiality and integrity of user sessions, potentially allowing attackers to impersonate legitimate users or steal sensitive information such as visitor logs or personal data. This could lead to unauthorized access to apartment visitor records, privacy violations, and reputational damage. While the vulnerability does not directly impact system availability, successful exploitation could facilitate further attacks or social engineering campaigns. Given that apartment visitor management systems often handle sensitive personal data and access control information, the impact on compliance with European data protection regulations such as GDPR could be significant if exploited. Organizations may face legal and financial consequences if they fail to secure these systems adequately.

To mitigate this vulnerability, organizations should implement strict input validation and output encoding for the 'visname' parameter in the affected PHP file to prevent script injection. Employing a web application firewall (WAF) with rules to detect and block XSS payloads targeting this parameter can provide temporary protection until a patch is available. Administrators should monitor logs for suspicious POST requests to bwdates-passreports-details.php and educate users about the risks of interacting with untrusted links or forms. It is critical to request or develop a vendor patch to properly sanitize inputs and update the system promptly once available. Additionally, adopting Content Security Policy (CSP) headers can help mitigate the impact of XSS by restricting the execution of unauthorized scripts. Regular security assessments and code reviews of web-facing components are recommended to identify and remediate similar vulnerabilities proactively.