CVE-2024-1026 is a Cross-Site Scripting (XSS) vulnerability identified in Cogites eReserv version 7.7.58, specifically affecting the file front/admin/config.php. The vulnerability arises from improper sanitization or validation of the 'id' parameter, which can be manipulated by an attacker to inject malicious JavaScript code. The example payload "%22%3E%3Cscript%3Ealert('XSS')%3C/script%3E" demonstrates how an attacker can inject a script tag that executes arbitrary JavaScript when a victim views the affected page. This type of vulnerability is classified under CWE-79, which pertains to improper neutralization of input during web page generation. The attack vector is remote, requiring only that the attacker craft a malicious URL or input that includes the payload. However, the CVSS 3.1 score is 3.5, indicating a low severity, largely because the attack requires some level of privileges (PR:L - low privileges) and user interaction (UI:R - user must interact, e.g., click a link). The impact is limited to integrity, with no direct confidentiality or availability impact. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability could allow an attacker to execute scripts in the context of the affected web application, potentially leading to session hijacking, defacement, or redirection to malicious sites if exploited successfully. Given that the vulnerability is in an administrative configuration file, it may be exposed only to authenticated users with some privileges, reducing the attack surface but still posing a risk if an attacker can lure an authorized user to a crafted URL or input.

For European organizations using Cogites eReserv 7.7.58, this vulnerability could lead to targeted attacks against administrative users who manage reservation configurations. Successful exploitation could allow attackers to execute arbitrary scripts in the context of the admin interface, potentially enabling session hijacking, unauthorized actions, or phishing attacks within the application environment. While the direct impact on confidentiality and availability is low, the integrity of administrative operations could be compromised, leading to misconfigurations or unauthorized changes. This could disrupt business processes relying on the eReserv system, especially in sectors like hospitality or event management where reservation systems are critical. Additionally, exploitation could be used as a foothold for further attacks within the network if combined with other vulnerabilities or social engineering. The requirement for user interaction and some privilege level reduces the risk of widespread automated exploitation but does not eliminate targeted attacks against high-value users.

To mitigate this vulnerability, European organizations should first verify if they are running Cogites eReserv version 7.7.58 and restrict access to the admin interface to trusted networks and users only. Implement strict input validation and output encoding on the 'id' parameter in front/admin/config.php to neutralize any injected scripts. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in the browser. Educate administrative users about the risks of clicking on untrusted links or inputs that could trigger XSS attacks. Monitor web application logs for suspicious input patterns targeting the 'id' parameter. If possible, isolate the eReserv administrative interface behind VPN or multi-factor authentication to reduce exposure. Since no patch is currently linked, contact Cogites support for updates or workarounds. Regularly review and update web application firewalls (WAF) rules to detect and block XSS payloads targeting this parameter. Finally, conduct security testing and code reviews focusing on input sanitization in all user-facing parameters.