CVE-2025-57968: VikRestaurants Reflected XSS Vulnerability

CVE-2025-57968 Overview

CVE-2025-57968 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the VikRestaurants WordPress plugin, a popular solution for managing table reservations and take-away orders. The vulnerability stems from improper neutralization of user-supplied input during web page generation, allowing attackers to inject malicious scripts that execute in the context of a victim's browser session.

This XSS vulnerability can be exploited by crafting malicious URLs containing JavaScript payloads that, when clicked by authenticated users or administrators, execute arbitrary code within their browser context. This could lead to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim.

Critical Impact

Attackers can steal session cookies, perform actions as authenticated users, deface website content, or redirect users to malicious sites through reflected XSS payloads.

Affected Products

• VikRestaurants WordPress Plugin versions through 1.5
• WordPress sites using vulnerable VikRestaurants installations
• e4jvikwp VikRestaurants Table Reservations and Take-Away Plugin

Discovery Timeline

• 2025-09-22 - CVE-2025-57968 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-57968

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The VikRestaurants plugin fails to properly sanitize user-controlled input before reflecting it back in HTTP responses, enabling attackers to inject malicious scripts.

Reflected XSS vulnerabilities in WordPress plugins are particularly dangerous because they can target site administrators who possess elevated privileges. When an administrator clicks a crafted malicious link, the injected script executes with their session context, potentially allowing attackers to modify plugin settings, create rogue administrator accounts, or inject persistent backdoors into the WordPress installation.

The vulnerability affects all versions of VikRestaurants from the initial release through version 1.5. Restaurant websites using this plugin for online reservations and take-away orders are at risk, as these sites typically handle customer data and payment information.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and output encoding within the VikRestaurants plugin. User-supplied data is included in dynamically generated HTML pages without proper sanitization, allowing HTML and JavaScript injection. WordPress provides built-in escaping functions such as esc_html(), esc_attr(), and wp_kses() that should be applied to all user-controlled data before output, but these protections were not consistently implemented in the affected versions.

Attack Vector

The attack vector for this reflected XSS vulnerability involves crafting malicious URLs that contain JavaScript payloads embedded in vulnerable parameters. When a victim clicks the malicious link, the payload is processed by the server and reflected back in the response without proper encoding, causing the browser to execute the injected script.

Typical attack scenarios include:

1. An attacker crafts a URL containing a malicious script in a vulnerable parameter
2. The attacker delivers this URL to potential victims via phishing emails, social media, or malicious advertisements
3. When the victim clicks the link while authenticated to the WordPress site, the malicious script executes
4. The script can steal session cookies, redirect users, or perform actions on behalf of the victim

For detailed technical analysis of this vulnerability, refer to the Patchstack XSS Vulnerability Report.

Detection Methods for CVE-2025-57968

Indicators of Compromise

• Unusual URL parameters containing encoded JavaScript or HTML tags in web server logs
• HTTP requests with suspicious query strings targeting VikRestaurants plugin endpoints
• Browser console errors indicating blocked script execution from Content Security Policy violations
• User reports of unexpected redirects or pop-ups when accessing the restaurant website

Detection Strategies

• Monitor web server access logs for URLs containing encoded script tags (%3Cscript%3E) or event handlers (onerror=, onload=)
• Implement Web Application Firewall (WAF) rules to detect and block common XSS payloads
• Deploy endpoint detection solutions that monitor browser behavior for suspicious script execution
• Conduct regular vulnerability scans of WordPress installations using tools that identify outdated plugins

Monitoring Recommendations

• Enable WordPress audit logging to track administrative actions and detect unauthorized changes
• Configure Content Security Policy (CSP) headers to restrict script execution sources
• Set up alerts for failed authentication attempts following suspicious URL access patterns
• Monitor for new user account creations, especially administrator-level accounts

How to Mitigate CVE-2025-57968

Immediate Actions Required

• Update VikRestaurants plugin to the latest patched version immediately
• Review WordPress user accounts for any unauthorized administrative users
• Audit recent site changes and plugin configurations for signs of compromise
• Implement a Web Application Firewall with XSS protection rules
• Consider temporarily disabling the VikRestaurants plugin until patching is complete

Patch Information

The vendor has been notified of this vulnerability. Site administrators should update the VikRestaurants plugin to the latest available version that addresses this XSS vulnerability. Check the WordPress plugin repository or the vendor's official website for security updates. For additional information, review the Patchstack vulnerability database entry for patch availability and timeline.

Workarounds

• Implement Content Security Policy headers to restrict inline script execution using script-src 'self'
• Deploy a WAF solution with XSS filtering capabilities to block malicious requests
• Restrict administrative access to trusted IP addresses only
• Enable HTTP-only and Secure flags on all session cookies to prevent JavaScript access
• Train staff to recognize and avoid clicking suspicious links, especially those targeting the WordPress admin interface

# WordPress security hardening configuration
# Add to .htaccess or nginx configuration

# Block common XSS attack patterns
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{QUERY_STRING} (<|%3C).*script.*(>|%3E) [NC,OR]
RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR]
RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2})
RewriteRule .* - [F,L]
</IfModule>

# Add security headers via wp-config.php
# header("Content-Security-Policy: script-src 'self'; object-src 'none';");
# header("X-XSS-Protection: 1; mode=block");
# header("X-Content-Type-Options: nosniff");