CVE-2025-6285 is a cross-site scripting (XSS) vulnerability identified in the PHPGurukul COVID19 Testing Management System version 2021. The vulnerability arises from improper input validation and sanitization of the 'q' parameter in the /search-report-result.php file. An attacker can manipulate this parameter to inject malicious scripts that execute in the context of the victim's browser. This vulnerability is remotely exploitable without requiring authentication, and user interaction is necessary for the attack to succeed, typically by tricking a user into clicking a crafted link or visiting a malicious page. The CVSS 4.0 base score is 5.3, indicating a medium severity level. The attack vector is network-based (AV:N), with low attack complexity (AC:L), no privileges required (PR:N), but requires user interaction (UI:P). The impact primarily affects the confidentiality and integrity of user data by potentially stealing session cookies, redirecting users, or performing unauthorized actions on behalf of the user. Availability impact is negligible. No known exploits are currently observed in the wild, but the exploit details have been publicly disclosed, increasing the risk of exploitation. The vulnerability does not involve any authentication bypass or privilege escalation but can be leveraged to target users of the system, potentially including healthcare workers and patients accessing COVID-19 test results or related sensitive information. Given the nature of the application, the vulnerability could facilitate phishing attacks or unauthorized data disclosure within healthcare environments managing COVID-19 testing data.

For European organizations, especially healthcare providers and public health authorities using the PHPGurukul COVID19 Testing Management System, this vulnerability poses a risk to the confidentiality and integrity of sensitive health data. Exploitation could lead to unauthorized disclosure of patient information, manipulation of test results, or session hijacking of legitimate users. This undermines trust in public health systems and could disrupt COVID-19 testing workflows. Additionally, since the system is used to manage critical health data, successful attacks could facilitate further social engineering or phishing campaigns targeting healthcare personnel and patients. The medium severity rating suggests moderate risk, but the public disclosure of exploit details increases the urgency for mitigation. The impact is amplified in environments where the system is integrated with other healthcare IT infrastructure, potentially allowing lateral movement or data leakage. However, the lack of known active exploitation reduces immediate threat levels but does not eliminate future risk.

1. Immediate implementation of input validation and output encoding on the 'q' parameter in /search-report-result.php to neutralize malicious scripts. Use established libraries or frameworks for sanitizing user input to prevent XSS. 2. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser context. 3. Conduct a thorough code review of the entire application to identify and remediate other potential XSS or injection points. 4. Educate users, especially healthcare staff, about the risks of clicking on suspicious links and the importance of verifying URLs before accessing the system. 5. Monitor web server logs and application logs for unusual query patterns or repeated attempts to exploit the 'q' parameter. 6. If possible, upgrade to a patched version of the PHPGurukul COVID19 Testing Management System once available or apply vendor-provided patches promptly. 7. Implement multi-factor authentication (MFA) for user access to reduce the impact of session hijacking. 8. Segment the COVID19 Testing Management System network to limit exposure and lateral movement in case of compromise. 9. Regularly update and patch the underlying web server and PHP environment to reduce the attack surface.