CVE-2026-0658: Five Star Restaurant Reservations CSRF Flaw

CVE-2026-0658 Overview

CVE-2026-0658 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the Five Star Restaurant Reservations WordPress plugin before version 2.7.9. The plugin fails to implement proper CSRF checks in certain bulk actions, enabling attackers to craft malicious requests that trick authenticated administrators into performing unauthorized actions, including the deletion of restaurant bookings.

Critical Impact

Attackers can exploit this CSRF vulnerability to delete booking records through malicious web pages, potentially causing significant business disruption and data loss for restaurant websites.

Affected Products

• Five Star Restaurant Reservations WordPress plugin versions prior to 2.7.9

Discovery Timeline

• 2026-02-02 - CVE-2026-0658 published to NVD
• 2026-02-03 - Last updated in NVD database

Technical Details for CVE-2026-0658

Vulnerability Analysis

This vulnerability stems from the absence of CSRF protection mechanisms in the bulk action handlers of the Five Star Restaurant Reservations plugin. When administrators perform bulk operations such as deleting multiple bookings, the plugin processes these requests without verifying that they originated from a legitimate source. This architectural oversight allows attackers to construct forged requests that execute these sensitive operations when an authenticated administrator visits a malicious webpage or clicks a crafted link.

The attack requires user interaction—specifically, a logged-in administrator must be tricked into visiting an attacker-controlled page or clicking a malicious link while authenticated to the WordPress site. Upon successful exploitation, the attacker can trigger bulk deletion of booking records, potentially wiping out critical reservation data.

Root Cause

The root cause is the missing implementation of WordPress nonce verification (CSRF tokens) in the bulk action processing functions. WordPress provides built-in CSRF protection through its nonce system via functions like wp_nonce_field() and wp_verify_nonce(), but the vulnerable versions of this plugin do not utilize these security measures for bulk operations. Without nonce validation, the server cannot distinguish between legitimate administrator requests and forged cross-site requests.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker must craft a malicious HTML page containing a hidden form or JavaScript that submits a forged request to the vulnerable WordPress endpoint. When an authenticated administrator visits the attacker's page, the browser automatically includes the administrator's session cookies with the forged request, causing the WordPress site to process the malicious bulk action as if it were a legitimate administrative operation.

The exploitation typically involves social engineering to lure the administrator to the malicious page—this could be through phishing emails, malicious advertisements, or compromised third-party websites. The attack is particularly effective because the victim may not notice any immediate indication that their booking data has been deleted.

Detection Methods for CVE-2026-0658

Indicators of Compromise

• Unexpected bulk deletion of booking records without corresponding administrator activity logs
• Missing or altered restaurant reservation entries without legitimate administrative explanation
• Access logs showing POST requests to bulk action endpoints from external referrers
• Administrator reports of visiting suspicious links followed by data loss

Detection Strategies

• Monitor WordPress database tables associated with the Five Star Restaurant Reservations plugin for unexpected mass deletions
• Implement web application firewall (WAF) rules to detect requests to bulk action endpoints with external or missing referer headers
• Enable and review WordPress audit logging to track administrative actions and identify anomalies
• Cross-reference administrator session activity with booking modification timestamps

Monitoring Recommendations

• Enable comprehensive logging for all plugin administrative actions
• Set up database-level alerts for bulk DELETE operations on reservation tables
• Monitor for unusual patterns in administrator account activity
• Implement real-time backup solutions to enable rapid recovery from data manipulation attacks

How to Mitigate CVE-2026-0658

Immediate Actions Required

• Update the Five Star Restaurant Reservations plugin to version 2.7.9 or later immediately
• Review booking data integrity and restore from backups if unauthorized deletions are detected
• Educate administrators about CSRF risks and safe browsing practices while authenticated
• Consider implementing additional WAF protections for WordPress administrative endpoints

Patch Information

The vulnerability has been addressed in Five Star Restaurant Reservations version 2.7.9. Administrators should update to this version or later through the WordPress plugin update mechanism. For detailed vulnerability information, refer to the WPScan Vulnerability Report.

Workarounds

• Limit administrator sessions and log out immediately after completing administrative tasks
• Use browser isolation or separate browser profiles for WordPress administration
• Implement network-level access controls to restrict WordPress admin access to trusted IP addresses
• Deploy a WAF with CSRF protection rules as an additional defense layer

# Verify current plugin version in WordPress
wp plugin list --name=five-star-restaurant-reservations --fields=name,version,status

# Update to patched version
wp plugin update five-star-restaurant-reservations

# Create backup before updating (recommended)
wp db export backup-before-plugin-update.sql