CVE-2025-31038: Essential Breadcrumbs CSRF Vulnerability

CVE-2025-31038 Overview

CVE-2025-31038 is a Cross-Site Request Forgery (CSRF) vulnerability in the Essential Marketer Essential Breadcrumbs plugin for WordPress that enables privilege escalation attacks. This vulnerability affects all versions of the plugin up to and including version 1.1.1. The flaw allows attackers to trick authenticated administrators into performing unintended actions, potentially leading to complete site compromise through unauthorized privilege elevation.

Critical Impact

Attackers can exploit this CSRF vulnerability to escalate privileges within WordPress installations, potentially gaining administrative access to affected sites without proper authorization.

Affected Products

• Essential Breadcrumbs WordPress plugin version 1.1.1 and earlier
• WordPress installations utilizing the Essential Breadcrumbs plugin
• Websites running vulnerable versions without CSRF token protection

Discovery Timeline

• 2025-04-09 - CVE-2025-31038 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-31038

Vulnerability Analysis

This vulnerability (CWE-352) exists due to missing or improper CSRF token validation in the Essential Breadcrumbs WordPress plugin. When users perform administrative actions within the plugin, the application fails to verify that the request originated from a legitimate source. This allows attackers to craft malicious web pages or links that, when visited by an authenticated administrator, execute unauthorized actions on the WordPress installation.

The attack chain leverages the trust relationship between the browser and the WordPress application. Since WordPress relies on session cookies for authentication, and the plugin does not implement proper CSRF protection, forged requests from malicious sites are processed as if they were legitimate administrator actions.

Root Cause

The root cause of this vulnerability is the absence of proper CSRF token validation in administrative functions of the Essential Breadcrumbs plugin. WordPress provides built-in nonce functionality for CSRF protection, but the plugin fails to implement these security measures on sensitive endpoints that handle privilege-related operations. This oversight allows attackers to bypass authentication checks and perform unauthorized actions on behalf of authenticated users.

Attack Vector

The attack requires user interaction—specifically, an authenticated WordPress administrator must be tricked into visiting a malicious webpage while logged into the vulnerable WordPress site. The attacker crafts a webpage containing a hidden form or script that submits a forged request to the Essential Breadcrumbs plugin endpoint. Since the victim's browser automatically includes session cookies with the request, the WordPress application processes the malicious request as legitimate, resulting in privilege escalation.

The attack scenario typically involves:

1. The attacker identifies a WordPress site running the vulnerable Essential Breadcrumbs plugin
2. A malicious webpage is created containing the forged request payload
3. The victim administrator is enticed to visit the malicious page via phishing or social engineering
4. The forged request is submitted to the WordPress site with the victim's authentication credentials
5. The plugin processes the request, escalating privileges as specified by the attacker

Detection Methods for CVE-2025-31038

Indicators of Compromise

• Unexpected user role changes or new administrator accounts in WordPress
• Unusual modification timestamps on WordPress user database entries
• Suspicious referrer headers in access logs indicating requests originating from external domains
• WordPress audit log entries showing administrative actions without corresponding user activity

Detection Strategies

• Monitor WordPress user database for unauthorized privilege modifications
• Implement web application firewall (WAF) rules to detect CSRF attack patterns
• Review HTTP referrer headers for requests to plugin administrative endpoints
• Enable and monitor WordPress security audit logging for role and capability changes

Monitoring Recommendations

• Configure real-time alerting for WordPress user role changes
• Establish baseline patterns for administrative actions and alert on anomalies
• Monitor for new administrator account creations outside normal business processes
• Implement endpoint detection to identify malicious form submissions from external sources

How to Mitigate CVE-2025-31038

Immediate Actions Required

• Update the Essential Breadcrumbs plugin to the latest patched version when available
• Temporarily disable the Essential Breadcrumbs plugin if no patch is currently available
• Audit all WordPress user accounts for unauthorized privilege escalations
• Implement additional CSRF protection at the web application firewall level

Patch Information

Organizations should monitor the Patchstack Vulnerability Report for updates regarding available patches. Until an official patch is released, consider removing or replacing the vulnerable plugin with an alternative breadcrumb solution that implements proper CSRF protection.

Workarounds

• Disable the Essential Breadcrumbs plugin until a security patch is available
• Implement server-level CSRF protection using security plugins or WAF rules
• Restrict administrative access to trusted IP addresses only
• Train administrators to avoid clicking suspicious links while logged into WordPress
• Use browser extensions or separate browser profiles for WordPress administration

# Configuration example
# Disable the vulnerable plugin via WP-CLI
wp plugin deactivate essential-breadcrumbs --path=/var/www/wordpress

# Verify plugin status
wp plugin list --path=/var/www/wordpress | grep essential-breadcrumbs

# Audit user roles for unauthorized changes
wp user list --role=administrator --path=/var/www/wordpress