CVE-2025-7139 is a cross-site scripting (XSS) vulnerability identified in version 1.0 of the SourceCodester Best Salon Management System, specifically within the /panel/edit-customer-detailed.php file that handles updating customer details. The vulnerability arises due to improper sanitization or validation of the 'Name' parameter, which allows an attacker to inject malicious scripts. This flaw can be exploited remotely without authentication, although it requires user interaction to trigger the malicious payload. The vulnerability has been publicly disclosed, increasing the risk of exploitation. The CVSS 4.0 base score is 4.8 (medium severity), reflecting that the attack vector is network-based with low attack complexity, no privileges required, but user interaction is necessary. The impact primarily affects the integrity and confidentiality of user data by enabling script execution in the context of the victim's browser, potentially leading to session hijacking, credential theft, or unauthorized actions within the salon management system's web interface. There is no indication of a patch or fix currently available, and no known exploits are actively observed in the wild.

For European organizations using the SourceCodester Best Salon Management System version 1.0, this XSS vulnerability poses a moderate risk. Exploitation could lead to unauthorized access to customer data, manipulation of customer records, or compromise of employee sessions, undermining data integrity and confidentiality. Given the nature of salon management systems, which often store personal identifiable information (PII) such as customer names, contact details, and appointment histories, a successful attack could result in privacy violations and regulatory non-compliance under GDPR. Additionally, the presence of malicious scripts could damage organizational reputation and customer trust. Although the vulnerability does not directly affect system availability, the indirect consequences of data breaches and potential regulatory fines could be significant. The requirement for user interaction limits automated exploitation but does not eliminate risk, especially if attackers employ social engineering to lure users into triggering the payload.

To mitigate this vulnerability, organizations should implement strict input validation and output encoding on the 'Name' parameter within the edit-customer-detailed.php component to neutralize malicious scripts. Employing Content Security Policy (CSP) headers can reduce the impact of XSS by restricting script execution sources. Since no official patch is currently available, organizations should consider temporary workarounds such as disabling or restricting access to the vulnerable page for non-administrative users. Conducting security awareness training to educate staff about the risks of clicking suspicious links or executing unknown scripts can reduce the likelihood of successful exploitation. Regularly monitoring web application logs for unusual input patterns or script injection attempts is recommended. Finally, organizations should maintain an inventory of affected systems and plan for timely updates once a vendor patch is released.