CVE-2024-7083: Email Encoder WordPress XSS Vulnerability

CVE-2024-7083 Overview

CVE-2024-7083 is a Stored Cross-Site Scripting (XSS) vulnerability affecting the Email Encoder WordPress plugin in versions prior to 2.3.4. The vulnerability exists due to insufficient sanitization and escaping of plugin settings, allowing authenticated attackers with administrative privileges to inject malicious scripts that persist in the application. This vulnerability is particularly concerning in WordPress multisite configurations where the unfiltered_html capability is typically restricted for security purposes.

Critical Impact

Administrative users can bypass security restrictions in multisite environments to execute persistent XSS attacks, potentially compromising other administrators or escalating attacks across the multisite network.

Affected Products

• Email Encoder WordPress plugin versions prior to 2.3.4
• WordPress multisite installations with restricted unfiltered_html capability
• WordPress single-site installations running vulnerable plugin versions

Discovery Timeline

• 2026-04-20 - CVE CVE-2024-7083 published to NVD
• 2026-04-20 - Last updated in NVD database

Technical Details for CVE-2024-7083

Vulnerability Analysis

This Stored Cross-Site Scripting vulnerability stems from the Email Encoder plugin's failure to properly sanitize and escape user-supplied input in its settings pages. When an administrator configures plugin options, the input values are stored without adequate sanitization and subsequently rendered without proper output escaping.

The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). In typical WordPress configurations, administrators have the unfiltered_html capability, which allows them to post unfiltered HTML content. However, in multisite environments, this capability is often disabled for security reasons. This vulnerability bypasses that security control, allowing administrators to inject persistent JavaScript code through the plugin's settings even when unfiltered_html is explicitly disallowed.

Root Cause

The root cause of CVE-2024-7083 is improper input validation and output encoding in the Email Encoder plugin's settings handling mechanism. The plugin fails to apply appropriate WordPress sanitization functions (such as sanitize_text_field(), esc_html(), or esc_attr()) when processing and displaying settings values. This allows HTML and JavaScript content to be stored in the database and subsequently executed in the browsers of users viewing pages that render these settings.

Attack Vector

The attack requires network access and administrative authentication to the WordPress installation. An attacker with administrator-level privileges navigates to the Email Encoder plugin settings page and injects malicious JavaScript code into one or more settings fields. This payload is then stored in the WordPress database and executed whenever the affected settings page is rendered, or when the injected content is displayed elsewhere in the application.

While this requires high privileges (administrator access), the vulnerability is significant in multisite environments where different administrators manage different sites within the same WordPress network. A compromised or malicious administrator on one site could potentially use this vulnerability to attack super administrators or administrators of other sites within the multisite network.

For detailed technical information, refer to the WPScan Vulnerability Report.

Detection Methods for CVE-2024-7083

Indicators of Compromise

• Unexpected JavaScript code or <script> tags present in Email Encoder plugin settings values
• Suspicious inline event handlers (such as onload, onerror, onclick) in plugin configuration data
• Unusual database entries in the wp_options table related to the Email Encoder plugin
• Browser developer console showing script execution from untrusted sources when viewing plugin settings

Detection Strategies

• Implement database monitoring to detect HTML/JavaScript injection in WordPress options tables
• Deploy web application firewalls (WAF) with rules to detect XSS patterns in POST requests to plugin settings endpoints
• Enable WordPress audit logging to track changes to plugin settings by administrative users
• Utilize SentinelOne's endpoint detection capabilities to identify malicious script execution patterns

Monitoring Recommendations

• Review WordPress audit logs for unexpected plugin settings modifications
• Monitor network traffic for suspicious outbound connections that may indicate XSS exploitation
• Implement regular security scans of WordPress installations using vulnerability scanning tools
• Enable real-time file integrity monitoring on WordPress installations

How to Mitigate CVE-2024-7083

Immediate Actions Required

• Update the Email Encoder plugin to version 2.3.4 or later immediately
• Review plugin settings for any suspicious content or injected scripts
• Audit administrator account activity for signs of compromise or malicious behavior
• Consider temporarily disabling the plugin until the update can be applied

Patch Information

The vulnerability has been addressed in Email Encoder plugin version 2.3.4. WordPress administrators should update to this version or later through the WordPress dashboard or by downloading the latest version from the WordPress plugin repository. For additional details, consult the WPScan Vulnerability Report.

Workarounds

• Restrict administrator access to trusted personnel only until the patch is applied
• Implement additional access controls at the network level to limit who can access the WordPress admin panel
• Deploy a Web Application Firewall (WAF) with XSS filtering rules as a temporary protective measure
• Consider removing the plugin temporarily if email encoding functionality is not critical to operations

# Verify current Email Encoder plugin version via WP-CLI
wp plugin list --name=email-encoder-bundle --fields=name,version,status

# Update to patched version
wp plugin update email-encoder-bundle

# Verify update was successful
wp plugin list --name=email-encoder-bundle --fields=name,version,status