CVE-2024-53778: Essential Breadcrumbs CSRF Vulnerability

CVE-2024-53778 Overview

CVE-2024-53778 is a Cross-Site Request Forgery (CSRF) vulnerability in the Essential Marketer Essential Breadcrumbs plugin for WordPress. The flaw enables Stored Cross-Site Scripting (XSS) when an authenticated administrator is tricked into visiting an attacker-controlled page. The vulnerability affects all versions of essential-breadcrumbs up to and including 1.1.1. The weakness is classified as [CWE-352] Cross-Site Request Forgery.

Critical Impact

An attacker who lures an authenticated WordPress administrator to a malicious URL can inject persistent JavaScript into plugin settings, leading to session hijacking, privilege abuse, and site-wide compromise of any visitor that renders the affected page.

Affected Products

• Essential Marketer Essential Breadcrumbs WordPress plugin
• Versions from n/a through 1.1.1
• WordPress sites with the plugin enabled and an administrator session active

Discovery Timeline

• 2024-11-30 - CVE-2024-53778 published to NVD via Patchstack
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2024-53778

Vulnerability Analysis

The Essential Breadcrumbs plugin exposes administrative settings endpoints that accept state-changing requests without verifying a valid WordPress nonce or equivalent anti-CSRF token. An attacker hosts a crafted page containing a forged form or fetch request targeting the plugin's settings handler. When a logged-in administrator visits that page, the browser submits the request with valid session cookies, and the plugin persists attacker-controlled input.

Because the same input path also lacks proper output sanitization and escaping, injected payloads are stored and later rendered in the plugin's breadcrumb output or settings UI. The result is Stored XSS chained from a CSRF entry point. The attack requires user interaction, executes over the network, and crosses a security scope from the unauthenticated attacker to the authenticated administrator context.

Root Cause

The root cause is missing or inadequate CSRF protection on the plugin's settings update handler, combined with insufficient sanitization of administrator-supplied fields. WordPress provides wp_nonce_field() and check_admin_referer() for nonce-based request validation, neither of which is enforced on the vulnerable code path through version 1.1.1.

Attack Vector

The attacker delivers a phishing link, malicious advertisement, or compromised page containing JavaScript that auto-submits a request to the target WordPress site's plugin endpoint. The victim must be an authenticated administrator. Once the forged request is processed, the malicious script payload becomes part of the plugin's stored configuration and executes in the browser of every user who loads a page where the breadcrumb component renders. See the Patchstack Vulnerability Report for additional technical context.

Detection Methods for CVE-2024-53778

Indicators of Compromise

• Unexpected <script>, onerror=, onload=, or javascript: strings persisted in wp_options rows associated with essential-breadcrumbs.
• HTTP POST requests to plugin settings endpoints originating from external Referer headers rather than the WordPress admin dashboard.
• Outbound browser requests from administrator workstations to unfamiliar domains immediately after visiting third-party pages.
• New or modified administrator accounts created shortly after suspicious admin browsing activity.

Detection Strategies

• Inspect plugin configuration values stored in the WordPress database for HTML or JavaScript content that should not appear in breadcrumb settings.
• Review web server access logs for POST requests to wp-admin/admin.php or options.php carrying essential-breadcrumbs parameters with non-WordPress Referer headers.
• Enable WordPress audit logging plugins to record administrative setting changes and correlate them with administrator session activity.

Monitoring Recommendations

• Alert on Content Security Policy (CSP) violations originating from pages that render the breadcrumb component.
• Monitor administrator accounts for anomalous browser sessions, especially requests submitted without prior dashboard navigation.
• Track plugin file integrity and database option changes through a Web Application Firewall (WAF) or file integrity monitoring tool.

How to Mitigate CVE-2024-53778

Immediate Actions Required

• Identify all WordPress sites running Essential Breadcrumbs version 1.1.1 or earlier and prioritize remediation.
• Deactivate and remove the plugin until a patched version is confirmed installed.
• Audit plugin settings and the wp_options table for stored script payloads and remove malicious content.
• Force a password reset and session invalidation for all administrator accounts.

Patch Information

No fixed version is listed in the NVD entry at the time of publication. Administrators should monitor the Patchstack Vulnerability Report and the plugin's WordPress.org listing for an updated release that adds nonce verification and input sanitization.

Workarounds

• Remove or disable the essential-breadcrumbs plugin until a vendor patch is available.
• Restrict administrator browsing on workstations and enforce isolated browser sessions for WordPress administration.
• Deploy a WAF rule that blocks state-changing requests to plugin settings endpoints lacking a valid same-origin Referer and WordPress nonce.
• Apply a strict Content Security Policy that disallows inline scripts on WordPress front-end pages.

# Configuration example: disable the plugin via WP-CLI on affected hosts
wp plugin deactivate essential-breadcrumbs --all
wp plugin delete essential-breadcrumbs