CVE-2025-8622 Overview
The Flexible Map plugin for WordPress contains a Stored Cross-Site Scripting (XSS) vulnerability in its Flexible Maps shortcode. All versions up to and including 1.18.0 are affected. The plugin fails to sanitize user-supplied shortcode attributes and does not escape output before rendering, allowing script injection into published pages.
Authenticated users with contributor-level access or higher can inject arbitrary JavaScript. The payload executes in any visitor's browser session when they access an injected page. The issue is tracked under CWE-79 and was reported through the Wordfence Vulnerability Report.
Critical Impact
Authenticated contributors can inject persistent JavaScript into pages, enabling session theft, administrative account takeover, and drive-by redirects against site visitors.
Affected Products
- Flexible Map WordPress plugin versions 1.18.0 and earlier
- WordPress sites allowing contributor-level accounts or above to use the Flexible Maps shortcode
- Sites distributing the plugin from the WordPress plugin repository
Discovery Timeline
- 2025-08-19 - CVE-2025-8622 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-8622
Vulnerability Analysis
The Flexible Map plugin exposes a shortcode that accepts multiple user-controlled attributes to configure Google Maps embeds. These attributes flow into rendered HTML without adequate sanitization or output escaping. An attacker with contributor privileges can craft shortcode parameters containing JavaScript payloads that are stored in post content and executed each time the page is rendered.
Because the injection is stored, every visitor to the affected page becomes a target. The scope change indicated by the vulnerability metadata reflects that scripts executed in a visitor's browser can act against resources outside the plugin's control, including administrator sessions and site cookies.
Root Cause
The plugin does not apply WordPress escaping functions such as esc_attr() or esc_html() to shortcode attributes before echoing them into map container markup. Server-side input sanitization on attribute values is also missing, allowing HTML control characters and script contexts to survive intact through storage and rendering.
Attack Vector
Exploitation requires an authenticated account with at least contributor permissions on the target WordPress site. The attacker creates or edits a post containing a Flexible Maps shortcode with a malicious attribute value. Once the post is viewed, whether in draft preview by an editor, or after publication by any visitor, the injected script executes in the victim's browser under the site's origin.
// Vendor patch metadata - flexible-map.php
// Plugin Name: Flexible Map
// Description: Embed Google Maps shortcodes in pages and posts...
-Version: 1.18.0
+Version: 1.19.0-dev
// Author: WebAware
// Text Domain: wp-flexible-map
Source: GitHub Commit 1cbae2f. The commit introduces escaping on shortcode attributes to remediate the XSS vector. The corresponding WordPress plugin changeset 3341890 reflects the same fix.
Detection Methods for CVE-2025-8622
Indicators of Compromise
- Post or page content containing Flexible Maps shortcodes with attributes holding HTML tags, <script> fragments, on* event handlers, or javascript: URIs
- Unexpected outbound requests from visitor browsers to attacker-controlled domains after loading pages that embed the shortcode
- New or modified posts created by contributor-role accounts referencing map shortcodes with unusual attribute payloads
Detection Strategies
- Query the wp_posts table for post content containing the Flexible Maps shortcode alongside HTML metacharacters such as <, >, or " inside attribute values
- Review WordPress audit logs for contributor-level users editing or publishing posts that embed the shortcode
- Scan rendered pages for reflected script tags or event handlers originating from map container elements
Monitoring Recommendations
- Enable a Web Application Firewall (WAF) rule set that flags stored XSS attempts targeting WordPress shortcode attributes
- Monitor administrator sessions for anomalous actions immediately after viewing contributor-authored pages
- Alert on Content Security Policy (CSP) violation reports referencing inline scripts on pages that render the Flexible Maps shortcode
How to Mitigate CVE-2025-8622
Immediate Actions Required
- Update the Flexible Map plugin to version 1.19.0 or later as soon as the patched release is available in the WordPress plugin repository
- Audit all existing posts using the Flexible Maps shortcode for suspicious attribute values and remove any injected payloads
- Review contributor-level and higher accounts, revoking access for unrecognized or dormant users
Patch Information
The vendor addressed the vulnerability in commit 1cbae2f, bumping the plugin version from 1.18.0 to 1.19.0-dev. The patch adds proper sanitization and escaping on shortcode attribute output. The fix is reflected in WordPress Plugin Changeset 3341890.
Workarounds
- Deactivate the Flexible Map plugin until the patched version is installed on production sites
- Restrict contributor and author roles from using the Flexible Maps shortcode by removing shortcode privileges through a role-management plugin
- Deploy a Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
- Apply WAF rules that block HTML control characters within known Flexible Map shortcode attributes
# Update the plugin via WP-CLI once the patched version is published
wp plugin update wp-flexible-map --version=1.19.0
# Temporary containment: deactivate the plugin site-wide
wp plugin deactivate wp-flexible-map
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
