CVE-2026-1096: Best-wp-google-map WordPress XSS Flaw

CVE-2026-1096 Overview

The Best-wp-google-map plugin for WordPress contains a Stored Cross-Site Scripting (XSS) vulnerability in all versions up to and including 2.1. The vulnerability exists due to insufficient input sanitization and output escaping in the latitude and longitudinal parameters of the google_map_view shortcode. This security flaw allows authenticated attackers with Contributor-level access or higher to inject arbitrary web scripts into pages, which execute whenever any user views the affected page.

Critical Impact

Authenticated attackers with minimal privileges (Contributor-level) can inject persistent malicious scripts that execute in the context of other users' browsers, potentially leading to session hijacking, credential theft, or further site compromise.

Affected Products

• Best-wp-google-map WordPress Plugin versions up to and including 2.1
• WordPress installations with the vulnerable plugin installed
• Sites where Contributors or higher roles have publishing privileges

Discovery Timeline

• 2026-02-14 - CVE CVE-2026-1096 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2026-1096

Vulnerability Analysis

This Stored Cross-Site Scripting vulnerability occurs in the shortcode processing logic of the Best-wp-google-map plugin. The plugin fails to properly sanitize user-supplied input and escape output when handling the latitude and longitudinal parameters within the google_map_view shortcode. When a user with Contributor-level access creates or edits content containing this shortcode, they can embed malicious JavaScript code within these coordinate parameters.

The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). The attack requires network access and low-privilege authentication, but no user interaction is needed for the injected script to execute once the page is viewed. The scope is changed, meaning the vulnerable component impacts resources beyond its security scope, affecting user browsers that view the injected page.

Root Cause

The root cause of this vulnerability lies in improper input handling within the plug-hook.php file at line 27. The plugin accepts coordinate values from the shortcode attributes without applying proper sanitization functions such as sanitize_text_field() or esc_attr(). When these values are rendered in the page output, they are not properly escaped, allowing script tags or event handlers embedded in the parameters to be interpreted as executable code by the browser.

Attack Vector

The attack vector is network-based and requires authenticated access with at least Contributor-level privileges. An attacker would craft a WordPress post or page containing the google_map_view shortcode with malicious JavaScript embedded in the latitude or longitudinal parameters. Once the content is published or saved as a draft viewable by others, any user who accesses the page will execute the injected script in their browser context.

The malicious payload persists in the WordPress database, making this a stored XSS vulnerability that can affect multiple users over time. Attackers could leverage this to steal session cookies, redirect users to phishing sites, deface the website, or perform actions on behalf of authenticated administrators.

Detection Methods for CVE-2026-1096

Indicators of Compromise

• Presence of unexpected JavaScript code or event handlers within google_map_view shortcode parameters in post content
• Unusual values in latitude or longitudinal attributes containing HTML tags, script elements, or event handlers like onerror or onload
• Database entries in wp_posts table containing suspicious shortcode content with encoded or obfuscated scripts

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect XSS payloads in POST requests targeting WordPress content creation endpoints
• Review WordPress audit logs for shortcode content containing script tags or JavaScript event handlers
• Use WordPress security plugins to scan for stored XSS patterns in post content and shortcode attributes
• Monitor for unexpected JavaScript execution or network requests originating from pages containing Google Map embeds

Monitoring Recommendations

• Enable detailed logging for content creation and modification events in WordPress
• Implement Content Security Policy (CSP) headers to detect and mitigate inline script execution
• Deploy browser-based XSS detection tools that alert on unexpected script execution patterns
• Regularly audit user roles and permissions, particularly for Contributor accounts

How to Mitigate CVE-2026-1096

Immediate Actions Required

• Update the Best-wp-google-map plugin to a version newer than 2.1 that contains the security fix
• Review existing posts and pages for potentially malicious content in google_map_view shortcodes
• Temporarily disable the Best-wp-google-map plugin if an update is not yet available
• Audit Contributor and Author accounts for suspicious activity or unauthorized content creation

Patch Information

The vulnerability affects Best-wp-google-map plugin versions up to and including 2.1. Site administrators should check the WordPress Plugin Overview for the latest patched version. Additional technical details about the vulnerability can be found in the Wordfence Vulnerability Analysis and the WordPress Plugin Source Code.

Workarounds

• Restrict content publishing capabilities by limiting the Contributor role or removing it from untrusted users
• Implement a content review workflow requiring Administrator approval before posts with shortcodes are published
• Add custom input validation filters to sanitize shortcode attributes before processing
• Use a Web Application Firewall with XSS detection rules to block malicious payloads

# Configuration example
# Add to wp-config.php to restrict unfiltered HTML capability
define('DISALLOW_UNFILTERED_HTML', true);

# Or add custom sanitization filter in theme's functions.php
# add_filter('the_content', 'sanitize_shortcode_content', 1);