CVE-2026-28076: Frenify Guff Auth Bypass Vulnerability

CVE-2026-28076 Overview

CVE-2026-28076 is a Missing Authorization vulnerability (CWE-862) affecting the Frenify Guff WordPress theme. This broken access control flaw allows attackers to exploit incorrectly configured access control security levels, potentially gaining unauthorized access to protected functionality or sensitive information. The vulnerability exists in Guff theme versions through 1.0.1 and can be exploited remotely without authentication.

Critical Impact

Unauthenticated attackers can bypass authorization controls to access restricted resources, potentially exposing sensitive data or enabling unauthorized actions on affected WordPress sites.

Affected Products

• Frenify Guff WordPress Theme versions through 1.0.1

Discovery Timeline

• 2026-03-05 - CVE CVE-2026-28076 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-28076

Vulnerability Analysis

This Missing Authorization vulnerability stems from inadequate access control implementation within the Guff WordPress theme. The vulnerability allows unauthenticated remote attackers to access functionality or data that should be restricted to authorized users only. The flaw can be exploited over the network without requiring any user interaction or special privileges, making it particularly concerning for exposed WordPress installations.

The vulnerability's impact is primarily focused on confidentiality, as attackers can potentially access sensitive information that should be protected by authorization controls. While the vulnerability does not directly enable modification of data or system availability impacts, the unauthorized information disclosure could lead to further attacks or data breaches.

Root Cause

The root cause of CVE-2026-28076 is the absence of proper authorization checks in the Guff theme's code. WordPress themes and plugins must implement appropriate capability checks and nonce verification to ensure that only authorized users can access protected features. In this case, one or more theme functions fail to verify that the requesting user has the necessary permissions before executing sensitive operations or returning protected data.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no authentication or user interaction. An attacker can directly send crafted requests to the vulnerable WordPress site to exploit the missing authorization checks. This could involve:

1. Identifying endpoints or AJAX handlers in the Guff theme that lack proper authorization verification
2. Sending direct requests to these endpoints without authentication
3. Accessing data or functionality that should require appropriate WordPress user capabilities

Since no exploit code is publicly available, organizations should refer to the Patchstack WordPress Vulnerability Report for detailed technical information about the specific vulnerable endpoints and exploitation methodology.

Detection Methods for CVE-2026-28076

Indicators of Compromise

• Unusual or unauthorized access patterns to WordPress theme endpoints
• HTTP requests to Guff theme-specific AJAX handlers from unauthenticated sources
• Log entries showing access to protected theme functionality without valid WordPress session cookies
• Unexpected data exfiltration or information disclosure from the WordPress installation

Detection Strategies

• Monitor WordPress access logs for requests targeting Guff theme endpoints without authentication
• Implement Web Application Firewall (WAF) rules to detect and block suspicious requests to theme handlers
• Review WordPress audit logs for unauthorized access attempts to protected functionality
• Deploy endpoint detection solutions to identify exploitation attempts in real-time

Monitoring Recommendations

• Enable detailed logging for all WordPress AJAX requests and theme function calls
• Configure alerts for unusual patterns of unauthenticated requests to theme-specific endpoints
• Monitor for signs of data exfiltration following successful exploitation
• Implement behavioral analysis to detect anomalous access patterns to protected WordPress resources

How to Mitigate CVE-2026-28076

Immediate Actions Required

• Identify all WordPress installations using the Frenify Guff theme version 1.0.1 or earlier
• Consider temporarily deactivating the Guff theme until a patched version is available
• Implement WAF rules to restrict access to potentially vulnerable theme endpoints
• Review WordPress logs for any evidence of prior exploitation attempts
• Assess what sensitive data may be accessible through the vulnerable functionality

Patch Information

As of the publication date, check for updated versions of the Frenify Guff theme that address this vulnerability. Monitor the Patchstack WordPress Vulnerability Report for patch availability and remediation guidance from the vendor.

Workarounds

• Temporarily switch to an alternative WordPress theme if the Guff theme is not critical to operations
• Implement server-level access controls to restrict access to theme-specific endpoints
• Deploy a WordPress security plugin with virtual patching capabilities to mitigate the vulnerability
• Use .htaccess or nginx configuration rules to block unauthenticated access to vulnerable theme handlers

# Example nginx configuration to restrict access to theme endpoints
# Add to your WordPress site's nginx configuration
location ~* /wp-content/themes/guff/ {
    # Restrict access to theme PHP files
    location ~ \.php$ {
        # Allow only authenticated WordPress admin requests
        # Adjust based on your specific security requirements
        deny all;
    }
}