CVE-2025-57962 is a medium-severity vulnerability classified under CWE-79, which corresponds to Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). This vulnerability affects the e4jvikwp VikRestaurants Table Reservations and Take-Away plugin, specifically versions up to 1.4. The flaw allows an attacker to inject malicious scripts that are stored persistently (Stored XSS) within the application. When other users or administrators access the affected web pages, the malicious script executes in their browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed with the victim's privileges. The CVSS v3.1 score of 5.9 reflects a medium severity with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), requiring high privileges (PR:H), user interaction (UI:R), scope changed (S:C), and low impact on confidentiality, integrity, and availability (C:L/I:L/A:L). The requirement for high privileges and user interaction reduces the ease of exploitation, but the scope change indicates that the vulnerability can affect resources beyond the initially vulnerable component. No known exploits are currently reported in the wild, and no patches have been linked yet. Stored XSS vulnerabilities are particularly dangerous in web applications handling sensitive user data or administrative functions, as they can be leveraged for persistent attacks against multiple users.

For European organizations using the VikRestaurants Table Reservations and Take-Away plugin, this vulnerability poses a risk of unauthorized script execution within their web environments. This can lead to compromised user sessions, theft of sensitive customer data, defacement of web pages, or unauthorized administrative actions. Given that the vulnerability requires high privileges to exploit and user interaction, the immediate risk is somewhat mitigated; however, if an attacker gains administrative access or tricks an authorized user into interacting with malicious content, the impact can be significant. European businesses in the hospitality sector relying on this plugin for online reservations and take-away orders could face reputational damage, regulatory scrutiny under GDPR for data breaches, and operational disruptions. The scope change in the CVSS vector suggests that the vulnerability could affect other components or users beyond the initial context, potentially amplifying the impact. Although no active exploits are reported, the presence of stored XSS vulnerabilities often attracts attackers due to their persistence and stealth, making proactive mitigation critical.

1. Immediate mitigation should focus on restricting administrative access and ensuring that only trusted users have high privileges within the VikRestaurants plugin environment. 2. Implement strict input validation and output encoding on all user-supplied data fields within the plugin, particularly those that generate web page content. 3. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in the browser context. 4. Monitor web application logs for unusual input patterns or script injection attempts. 5. Since no official patch is currently linked, organizations should contact the vendor e4jvikwp for updates or consider disabling the plugin temporarily if feasible. 6. Educate users with high privileges about phishing and social engineering risks to reduce the chance of user interaction exploitation. 7. Conduct regular security assessments and penetration testing focused on XSS vulnerabilities in the web application environment. 8. Use web application firewalls (WAF) with rules designed to detect and block XSS payloads targeting this plugin.