CVE-2024-37102: Blossomthemes Vilva CSRF Vulnerability

CVE-2024-37102 Overview

CVE-2024-37102 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] affecting the BlossomThemes Vilva WordPress theme. The flaw impacts all versions from initial release through 1.2.2. Attackers can trick authenticated users into submitting forged requests that perform state-changing actions on the affected WordPress site. Exploitation requires user interaction, typically through a malicious link or crafted web page. Successful exploitation can lead to unauthorized modifications, data integrity loss, and potential availability impact.

Critical Impact

Attackers can forge authenticated administrative requests through victim browsers, leading to high impact on confidentiality, integrity, and availability of the WordPress site.

Affected Products

• BlossomThemes Vilva WordPress theme versions through 1.2.2
• WordPress installations using the Vilva theme
• Sites where administrators or privileged users interact with attacker-controlled content

Discovery Timeline

• 2025-01-02 - CVE-2024-37102 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2024-37102

Vulnerability Analysis

The Vilva theme fails to validate the origin and authenticity of state-changing HTTP requests. WordPress provides a built-in nonce mechanism through wp_nonce_field() and check_admin_referer() to prevent CSRF attacks. The Vilva theme does not properly implement these protections on sensitive request handlers. An attacker who lures an authenticated administrator to a malicious page can trigger unauthorized actions in the context of that user's session.

Root Cause

The root cause is missing or improperly validated anti-CSRF tokens [CWE-352] on request handlers exposed by the theme. Without nonce verification, the server cannot distinguish between legitimate requests originating from the WordPress administrative interface and forged requests originating from third-party sites. This allows cross-origin requests carrying the victim's authenticated session cookie to succeed.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker hosts a malicious page or sends a phishing link containing a crafted form or image tag. When an authenticated Vilva administrator visits the page, the browser automatically attaches WordPress session cookies. The forged request executes with the victim's privileges. This pattern can be used to modify theme settings or perform other privileged actions exposed by the vulnerable handlers. For technical details, see the Patchstack CSRF Vulnerability Advisory.

Detection Methods for CVE-2024-37102

Indicators of Compromise

• Unexpected modifications to Vilva theme settings or WordPress configuration without corresponding administrator activity logs
• HTTP Referer headers from external domains on requests targeting Vilva theme endpoints
• POST requests to theme administration handlers lacking valid WordPress nonce parameters (_wpnonce)
• Session activity originating from administrators immediately after visits to untrusted external sites

Detection Strategies

• Inspect web server access logs for POST requests to Vilva theme endpoints with cross-origin Referer headers
• Enable WordPress audit logging plugins to track configuration changes and correlate them with administrator session activity
• Deploy a Web Application Firewall (WAF) rule set that flags requests missing expected nonce tokens on theme endpoints

Monitoring Recommendations

• Monitor WordPress wp_options and theme settings tables for unexpected modifications
• Alert on administrator account actions performed outside normal working hours or from unusual IP addresses
• Track outbound browser navigation patterns from administrator workstations to detect phishing or watering-hole activity

How to Mitigate CVE-2024-37102

Immediate Actions Required

• Identify all WordPress sites running the BlossomThemes Vilva theme and confirm the installed version
• Restrict administrator access to trusted networks and require multi-factor authentication for all privileged WordPress accounts
• Educate administrators to avoid clicking untrusted links while logged into the WordPress admin panel
• Apply the vendor-supplied patched version of the Vilva theme once available

Patch Information

No fixed version has been confirmed in the available references. Site operators should consult the Patchstack CSRF Vulnerability Advisory and the BlossomThemes vendor channels for an updated release beyond version 1.2.2.

Workarounds

• Deactivate the Vilva theme and switch to an alternative theme until a patched version is released
• Deploy a WordPress security plugin or WAF that enforces SameSite=Lax or SameSite=Strict cookie attributes on session cookies
• Limit administrative sessions through short session timeouts and dedicated browsers used exclusively for WordPress administration
• Block cross-origin requests to /wp-admin/ endpoints at the reverse proxy layer using strict Referer and Origin header validation

# Example nginx configuration to enforce same-origin requests to wp-admin
location /wp-admin/ {
    if ($http_origin !~* ^https?://(www\.)?yourdomain\.com$) {
        return 403;
    }
    if ($request_method = POST) {
        if ($http_referer !~* ^https?://(www\.)?yourdomain\.com/) {
            return 403;
        }
    }
}