CVE-2026-2367: WordPress Secure Copy Plugin XSS Flaw

CVE-2026-2367 Overview

The Secure Copy Content Protection and Content Locking plugin for WordPress contains a Stored Cross-Site Scripting (XSS) vulnerability in the ays_block shortcode. This vulnerability affects all versions up to and including 5.0.1 and stems from insufficient input sanitization and output escaping on user-supplied attributes within the shortcode handler.

Authenticated attackers with contributor-level access or higher can exploit this flaw to inject arbitrary JavaScript that executes whenever any user accesses an injected page. This type of stored XSS is particularly dangerous as the malicious payload persists in the database and affects all visitors to the compromised page.

Critical Impact

Authenticated attackers can inject persistent malicious scripts that execute in the browsers of all users visiting affected pages, potentially leading to session hijacking, credential theft, or website defacement.

Affected Products

• Secure Copy Content Protection and Content Locking plugin for WordPress versions up to and including 5.0.1

Discovery Timeline

• 2026-02-25 - CVE-2026-2367 published to NVD
• 2026-02-25 - Last updated in NVD database

Technical Details for CVE-2026-2367

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting (XSS). The flaw exists in the plugin's public-facing shortcode implementation, specifically in the ays_block shortcode handler.

The vulnerable code can be found in the class-secure-copy-content-protection-public.php file, where user-supplied shortcode attributes are processed without adequate sanitization before being rendered in the page output. When contributors or other authenticated users with shortcode capabilities create or edit posts, they can inject malicious attribute values that bypass insufficient validation checks.

The stored nature of this XSS vulnerability means the injected payload is saved to the WordPress database and rendered each time the affected page is loaded, creating a persistent attack vector that impacts all site visitors.

Root Cause

The root cause of this vulnerability is insufficient input sanitization and output escaping within the shortcode attribute processing logic. The plugin fails to properly sanitize user-supplied attributes before incorporating them into the HTML output, allowing attackers to inject script tags or event handlers that execute arbitrary JavaScript code.

WordPress provides functions like esc_attr(), esc_html(), and wp_kses() specifically to prevent XSS attacks, but these were not adequately applied to the shortcode attributes in vulnerable versions.

Attack Vector

The attack vector is network-based and requires low-privilege authenticated access (contributor-level or above). An attacker with valid WordPress credentials can create or edit a post containing the ays_block shortcode with maliciously crafted attributes.

The malicious attributes can contain JavaScript payloads that execute in the browser context of any user viewing the injected page. This includes administrators, potentially allowing attackers to perform actions with elevated privileges such as creating new admin accounts, modifying site settings, or exfiltrating sensitive data.

The vulnerability does not require user interaction beyond normal page viewing, making it particularly effective for broad exploitation scenarios.

Detection Methods for CVE-2026-2367

Indicators of Compromise

• Unusual or obfuscated JavaScript code within post content containing the ays_block shortcode
• Posts created or modified by contributor-level users containing suspicious shortcode attributes
• Unexpected network requests from visitor browsers to external domains
• Reports of browser security warnings or unusual behavior when viewing specific pages

Detection Strategies

• Review WordPress posts and pages for instances of the ays_block shortcode with unexpected or encoded attribute values
• Monitor web application firewall (WAF) logs for XSS attack patterns targeting shortcode parameters
• Implement content security policies (CSP) to detect and block unauthorized script execution
• Use WordPress security plugins to scan for known malicious patterns in post content

Monitoring Recommendations

• Enable detailed logging for post creation and modification events, particularly for contributor-level users
• Configure browser-side monitoring to detect anomalous JavaScript execution patterns
• Set up alerts for outbound connections to unknown or suspicious domains from client browsers
• Regularly audit user accounts with contributor or higher permissions for suspicious activity

How to Mitigate CVE-2026-2367

Immediate Actions Required

• Update the Secure Copy Content Protection and Content Locking plugin to the latest patched version immediately
• Review all existing posts and pages containing the ays_block shortcode for potentially malicious content
• Audit user accounts with contributor-level access or above for unauthorized activity
• Consider temporarily disabling the plugin if an immediate update is not possible

Patch Information

The vulnerability has been addressed in a plugin update. The WordPress Plugin Changeset Update contains the security fix implementing proper input sanitization and output escaping for shortcode attributes.

Administrators should update to the latest version through the WordPress admin dashboard or by downloading the patched version directly from the WordPress plugin repository.

Additional technical details and vulnerability analysis are available in the Wordfence Vulnerability Analysis.

Workarounds

• Temporarily disable the Secure Copy Content Protection and Content Locking plugin until the update can be applied
• Restrict contributor-level access permissions to trusted users only
• Implement a Web Application Firewall (WAF) with XSS protection rules to filter malicious shortcode attributes
• Use Content Security Policy (CSP) headers to mitigate the impact of any successful XSS injection

# Example: Add Content Security Policy header in .htaccess
Header set Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'"