CVE-2025-13727: WordPress Video Share VOD XSS Vulnerability

CVE-2025-13727 Overview

The Video Share VOD – Turnkey Video Site Builder Script plugin for WordPress contains a Stored Cross-Site Scripting (XSS) vulnerability in all versions up to, and including, 2.7.11. The vulnerability exists due to insufficient input sanitization and output escaping in plugin settings. Authenticated attackers with editor-level permissions and above can inject arbitrary web scripts into pages that execute whenever users access the affected content.

Critical Impact

This vulnerability allows authenticated attackers to inject persistent malicious scripts that execute in the context of other users' browsers, potentially leading to session hijacking, credential theft, or further compromise of WordPress installations. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Affected Products

• Video Share VOD – Turnkey Video Site Builder Script plugin for WordPress versions up to and including 2.7.11
• WordPress multi-site installations using the affected plugin
• WordPress installations where unfiltered_html capability has been disabled

Discovery Timeline

• 2026-02-18 - CVE CVE-2025-13727 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2025-13727

Vulnerability Analysis

This Stored Cross-Site Scripting vulnerability (CWE-79) resides in the Video Share VOD plugin's shortcode handling functionality. The root cause is inadequate sanitization and escaping of user-controlled input within the plugin settings interface. When an authenticated user with editor-level permissions or higher modifies plugin settings, malicious JavaScript code can be stored in the database and subsequently rendered without proper escaping when pages are accessed by other users.

The vulnerability specifically affects WordPress multi-site installations and single-site installations where the unfiltered_html capability has been disabled. Under normal WordPress configurations with unfiltered_html enabled, administrators and editors can already insert arbitrary HTML, making this vulnerability moot. However, in hardened environments where this capability is restricted, the plugin fails to properly sanitize inputs, creating an attack vector.

Root Cause

The vulnerability stems from insufficient input sanitization and output escaping in the plugin's shortcode implementation. The affected code locations in inc/shortcodes.php fail to properly escape user-supplied data before rendering it in the HTML output. This allows attackers to bypass WordPress's built-in security measures designed to prevent XSS attacks from lower-privileged users. For technical details, refer to the WordPress Video Share VOD Code Reference and additional shortcode handling code.

Attack Vector

The attack vector requires network access and authenticated access with editor-level privileges or higher. An attacker would need to:

1. Authenticate to the WordPress installation with at least editor-level permissions
2. Navigate to the Video Share VOD plugin settings
3. Inject malicious JavaScript code into vulnerable settings fields
4. The malicious script is stored in the database
5. When any user (including administrators) views a page that renders the affected content, the malicious script executes in their browser context

The vulnerability requires high complexity to exploit due to the specific conditions needed (multi-site or disabled unfiltered_html), but successful exploitation can lead to cross-site impact, affecting the confidentiality and integrity of other users' sessions.

Detection Methods for CVE-2025-13727

Indicators of Compromise

• Unexpected JavaScript code in Video Share VOD plugin settings or database entries
• Suspicious <script> tags or event handlers (e.g., onerror, onload) in plugin configuration values
• Unusual activity from editor-level user accounts modifying plugin settings
• Browser-based alerts or unexpected redirects when viewing video content pages

Detection Strategies

• Review Video Share VOD plugin settings for any suspicious JavaScript or HTML injection attempts
• Audit WordPress database entries related to the plugin for malicious payloads
• Monitor WordPress audit logs for unusual plugin configuration changes by editor-level users
• Implement Content Security Policy (CSP) headers to detect and block unauthorized script execution

Monitoring Recommendations

• Enable WordPress activity logging to track plugin setting modifications
• Configure web application firewall (WAF) rules to detect XSS patterns in POST requests to plugin settings endpoints
• Implement real-time monitoring for JavaScript execution anomalies on video content pages
• Review access logs for unusual patterns of settings page access by editor accounts

How to Mitigate CVE-2025-13727

Immediate Actions Required

• Update the Video Share VOD plugin to a version newer than 2.7.11 immediately
• Audit existing plugin settings for any injected malicious content
• Review user accounts with editor-level or higher permissions for unauthorized access
• Consider temporarily disabling the plugin if an update is not immediately available

Patch Information

A security patch has been released to address this vulnerability. The fix is available in WordPress Changeset #3463296, which implements proper input sanitization and output escaping for the affected plugin settings. The patched version includes improved validation using WordPress's built-in escaping functions such as esc_html(), esc_attr(), and wp_kses() to prevent script injection.

For detailed vulnerability analysis and patch verification, refer to the Wordfence Vulnerability Analysis.

Workarounds

• Restrict editor-level access to trusted users only until the plugin is updated
• Implement a Web Application Firewall (WAF) with XSS protection rules
• Enable Content Security Policy headers to mitigate the impact of successful XSS attacks
• Consider disabling the Video Share VOD plugin temporarily in multi-site environments

# WordPress CLI commands to audit and restrict plugin access
# Check current plugin version
wp plugin list --name=video-share-vod --fields=name,version,status

# Update the plugin to the latest patched version
wp plugin update video-share-vod

# Optionally deactivate until updated (for multi-site)
wp plugin deactivate video-share-vod --network