CVE-2026-24617: Easy Modal Stored XSS Vulnerability

CVE-2026-24617 Overview

A Stored Cross-Site Scripting (XSS) vulnerability has been identified in the Easy Modal WordPress plugin developed by Daniel Iser. This vulnerability stems from improper neutralization of user input during web page generation, allowing attackers to inject and store malicious scripts that execute in the context of other users' browsers.

Critical Impact

Attackers with low-level privileges can inject persistent malicious scripts that execute whenever other users view affected pages, potentially leading to session hijacking, credential theft, or further compromise of the WordPress site.

Affected Products

• Easy Modal WordPress Plugin version 2.1.0 and earlier
• WordPress installations using vulnerable Easy Modal versions

Discovery Timeline

• January 23, 2026 - CVE-2026-24617 published to NVD
• January 26, 2026 - Last updated in NVD database

Technical Details for CVE-2026-24617

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The Stored XSS variant is particularly dangerous because malicious payloads persist on the server and affect any user who accesses the compromised content.

The Easy Modal plugin fails to properly sanitize user-supplied input before storing and rendering it within modal popup configurations. This allows authenticated users with relatively low privileges to inject JavaScript code that persists in the database and executes in victims' browsers when they view pages containing the affected modals.

The attack requires user interaction (a victim must view the page with the malicious modal), and the scope is changed, meaning the vulnerability can impact resources beyond the vulnerable component itself—specifically affecting other users' browser sessions.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and output encoding within the Easy Modal plugin. User-controlled data submitted through modal configuration options is stored directly in the WordPress database without proper sanitization. When this data is subsequently rendered on the frontend, it is output without adequate escaping, allowing embedded script tags or event handlers to execute in visitors' browsers.

Attack Vector

The attack is conducted over the network and requires an authenticated user with low-level privileges (such as a contributor or author role) to access the modal creation functionality. The attacker crafts a malicious modal configuration containing JavaScript payloads within input fields that accept rich content or HTML attributes.

When administrators or other site visitors view pages containing the weaponized modal, the injected script executes with the victim's session context. This can be leveraged to steal session cookies, perform actions on behalf of the victim, redirect users to malicious sites, or deface website content.

The vulnerability mechanism involves injecting malicious JavaScript code through the modal configuration interface. When the modal is displayed on the frontend, the unsanitized content is rendered directly in the HTML, causing the browser to execute the attacker's script. For detailed technical information, refer to the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2026-24617

Indicators of Compromise

• Unexpected JavaScript code or <script> tags within Easy Modal configuration entries in the WordPress database
• Anomalous modal content containing event handlers such as onerror, onload, or onclick with JavaScript payloads
• Reports from users experiencing unexpected redirects or pop-ups when viewing pages with modals
• Web application firewall logs showing XSS patterns in requests to modal configuration endpoints

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common XSS payload patterns in plugin configuration requests
• Monitor WordPress database tables associated with Easy Modal for entries containing suspicious HTML or JavaScript
• Deploy Content Security Policy (CSP) headers to detect and report inline script execution attempts
• Utilize WordPress security plugins that scan for stored XSS vulnerabilities in plugin data

Monitoring Recommendations

• Enable detailed logging for WordPress admin actions, particularly those related to Easy Modal configuration changes
• Configure real-time alerts for CSP violation reports that may indicate XSS exploitation attempts
• Regularly audit user accounts with permissions to create or modify modals for suspicious activity
• Monitor server-side logs for unusual patterns in requests to Easy Modal-related endpoints

How to Mitigate CVE-2026-24617

Immediate Actions Required

• Audit all existing Easy Modal configurations for potentially malicious content and remove any suspicious entries
• Consider temporarily disabling the Easy Modal plugin until a patched version is available
• Restrict modal creation permissions to trusted administrator accounts only
• Implement Content Security Policy headers to mitigate the impact of any stored XSS payloads

Patch Information

Users should monitor the official Easy Modal plugin page on the WordPress Plugin Directory and the Patchstack vulnerability database for updates regarding a security patch. Update to the latest version as soon as a fix becomes available.

Workarounds

• Deactivate and remove the Easy Modal plugin if modal functionality is not essential to your site
• Use WordPress capability management plugins to restrict which user roles can access Easy Modal settings
• Deploy a WAF with rules specifically designed to filter XSS payloads in WordPress plugin inputs
• Implement strict Content Security Policy headers to prevent inline script execution

# Add Content Security Policy header to wp-config.php or .htaccess
# Apache .htaccess example
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline';"

# Or add to WordPress via functions.php
# add_action('send_headers', function() {
#     header("Content-Security-Policy: default-src 'self'; script-src 'self';");
# });