CVE-2025-8568 Overview
CVE-2025-8568 is a Stored Cross-Site Scripting (XSS) vulnerability in the GMap Generator plugin for WordPress. The flaw affects all versions up to and including 1.1. Authenticated users with Contributor-level access or higher can inject arbitrary JavaScript through the h parameter. Injected scripts execute in the browser of any user who visits an affected page. The vulnerability is tracked under CWE-79 and stems from insufficient input sanitization and output escaping in the plugin's shortcode handling.
Critical Impact
Authenticated contributors can persist malicious JavaScript in WordPress pages, enabling session theft, administrative action forgery, and redirection of site visitors.
Affected Products
- GMap Generator plugin for WordPress — all versions ≤ 1.1
- WordPress sites permitting Contributor-level or higher registrations
- Any WordPress installation with the gmap-venturit plugin active
Discovery Timeline
- 2025-08-12 - CVE-2025-8568 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-8568
Vulnerability Analysis
The GMap Generator plugin exposes a shortcode that accepts a user-controlled h parameter, intended to define the height of an embedded Google Map. The plugin writes this value into rendered HTML output without applying WordPress sanitization functions such as esc_attr() or absint(). As a result, an attacker can supply arbitrary HTML or JavaScript that becomes part of the page markup.
Because the payload is stored inside post or page content, the attack persists across sessions and executes for every subsequent visitor. The Contributor role requirement limits opportunistic abuse but does not prevent exploitation on sites that allow open registration or guest authorship. The changed scope (S:C) reflects that injected scripts can affect resources beyond the vulnerable component, including administrator sessions.
Root Cause
The root cause is missing input validation and output escaping in the plugin's shortcode handler within google-map.php. User-supplied attributes flow into HTML attribute context without contextual encoding. WordPress provides esc_attr(), esc_html(), and wp_kses() helpers specifically to prevent this class of injection, but the plugin does not invoke them on the h parameter.
Attack Vector
An authenticated attacker with Contributor privileges creates or edits a post containing the vulnerable shortcode. The attacker embeds a crafted h attribute containing a script payload or event-handler-bearing HTML. When a reviewer, editor, or administrator previews or publishes the post — or when an unauthenticated visitor loads the resulting page — the payload executes in their browser under the site's origin.
Typical exploitation outcomes include theft of authentication cookies, unauthorized creation of administrator accounts through CSRF against wp-admin endpoints, defacement, and redirection to attacker-controlled infrastructure. See the Wordfence Vulnerability Report and the WordPress Plugin Source Code for technical detail.
Detection Methods for CVE-2025-8568
Indicators of Compromise
- Post or page content containing GMap Generator shortcodes with h values that include <script>, onerror=, onload=, or javascript: substrings
- Unexpected new administrator accounts created shortly after Contributor-authored content is reviewed
- Outbound requests from admin browser sessions to unfamiliar external domains referenced in page markup
Detection Strategies
- Query the wp_posts table for post_content values matching the plugin shortcode combined with suspicious h parameter contents
- Enable a Content Security Policy (CSP) in report-only mode and review violations for inline script execution originating from post pages
- Monitor web server access logs for POST requests to wp-admin/post.php from Contributor accounts followed by GET traffic to the resulting permalinks
Monitoring Recommendations
- Alert on creation of new privileged WordPress accounts and on changes to user roles within 24 hours of Contributor post submissions
- Track file integrity of files under wp-content/plugins/gmap-venturit/ to detect tampering or unauthorized reintroduction after removal
- Log and review all Contributor-submitted content prior to publication when the plugin remains installed
How to Mitigate CVE-2025-8568
Immediate Actions Required
- Deactivate and remove the GMap Generator plugin from the WordPress installation until a patched release is confirmed
- Audit all published and draft posts for shortcodes containing script payloads in the h parameter and purge affected content
- Rotate credentials and invalidate active sessions for administrator and editor accounts that reviewed Contributor content
Patch Information
At the time of the last NVD update on 2026-06-17, no fixed version has been published in the referenced advisories. Monitor the WordPress plugin page and the Wordfence Vulnerability Report for release updates.
Workarounds
- Restrict Contributor and higher role assignments to trusted users and disable open user registration under Settings → General
- Deploy a web application firewall rule that blocks shortcode parameters containing HTML tags or JavaScript URI schemes
- Apply a strict Content Security Policy that disallows inline scripts and unauthorized external script sources
# Disable the vulnerable plugin via WP-CLI
wp plugin deactivate gmap-venturit
wp plugin delete gmap-venturit
# Disable open user registration
wp option update users_can_register 0
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
