CVE-2025-32683: MapSVG DOM-Based XSS Vulnerability

CVE-2025-32683 Overview

CVE-2025-32683 is a DOM-Based Cross-Site Scripting (XSS) vulnerability in the RomanCode MapSVG mapsvg-lite-interactive-vector-maps WordPress plugin. The flaw affects all versions up to and including 8.6.6. It stems from improper neutralization of input during web page generation [CWE-79]. An authenticated attacker with low privileges can inject script that executes in the browser context of a victim who interacts with crafted content.

Critical Impact
Successful exploitation allows attackers to execute arbitrary JavaScript in the context of a victim's session, potentially leading to session theft, data exposure, and unauthorized actions within the WordPress site.

Affected Products

RomanCode MapSVG mapsvg-lite-interactive-vector-maps WordPress plugin
All versions through 8.6.6
WordPress sites with the MapSVG Lite plugin enabled

Discovery Timeline

2025-04-09 - CVE-2025-32683 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-32683

Vulnerability Analysis

The vulnerability is a DOM-Based XSS in the MapSVG Lite plugin for WordPress. DOM-Based XSS occurs when client-side JavaScript writes attacker-controllable data into the Document Object Model (DOM) without proper sanitization or encoding. The plugin processes user-supplied input and reflects it into page elements executed by the browser.

Because the injection path is client-side, server-side web application firewall (WAF) rules that only inspect request payloads may not observe the final sink where the payload executes. The attack requires user interaction, meaning a victim must view or interact with the crafted content for the payload to fire.

Root Cause

The root cause is missing or inadequate output encoding in client-side code paths that render user-controlled values into the DOM. Input flows from a source such as URL fragments, query parameters, or stored plugin data into a DOM sink without being passed through a safe encoding or sanitization routine, violating the guidance under [CWE-79].

Attack Vector

Exploitation is network-based and requires low privileges on the target WordPress instance plus victim interaction. An attacker crafts a payload containing JavaScript and places it where the vulnerable plugin code will consume it. When a targeted user loads or interacts with the affected map component, the script executes in the user's browser session with the privileges of that session, which may include an administrator.

No verified public proof-of-concept code is available. See the Patchstack Vulnerability Advisory for additional technical details.

Detection Methods for CVE-2025-32683

Indicators of Compromise

Unexpected <script> tags, event handlers (onerror, onload), or javascript: URIs stored in MapSVG plugin content or options.
Browser console errors or Content Security Policy (CSP) violation reports originating from pages rendering MapSVG components.
Outbound requests from authenticated administrator sessions to unfamiliar external domains shortly after loading MapSVG-enabled pages.
New or modified WordPress administrator accounts without a corresponding authorized change ticket.

Detection Strategies

Inventory WordPress installations for the mapsvg-lite-interactive-vector-maps plugin and record versions at or below 8.6.6.
Review plugin-managed database entries for stored HTML or JavaScript content that was not authored by site administrators.
Deploy CSP in report-only mode to surface script-source violations tied to MapSVG rendering paths.

Monitoring Recommendations

Alert on WordPress audit log entries showing plugin option changes by low-privileged editor or contributor accounts.
Monitor web server logs for repeated requests to MapSVG endpoints paired with HTML-encoded script payload patterns.
Correlate administrator session anomalies with pageviews of MapSVG-enabled posts or pages in your SIEM.

How to Mitigate CVE-2025-32683

Immediate Actions Required

Identify all WordPress sites running MapSVG Lite version 8.6.6 or earlier and prioritize them for patching.
Restrict plugin editing and content submission privileges to trusted accounts until a fixed version is deployed.
Enforce a strict Content Security Policy to limit inline script execution and reduce the impact of DOM-Based XSS.
Review existing MapSVG content for stored payloads and remove any unauthorized script or event-handler attributes.

Patch Information

At the time of publication, the advisory indicates the issue affects MapSVG Lite from unspecified versions through 8.6.6. Administrators should consult the Patchstack Vulnerability Advisory and the plugin's WordPress.org listing for the latest fixed release and update accordingly.

Workarounds

Disable or uninstall the MapSVG Lite plugin until a fixed version is applied if the plugin is not business-critical.
Place the WordPress admin interface behind a WAF with XSS rules and restrict access by IP address or VPN.
Require multi-factor authentication (MFA) for all WordPress administrator and editor accounts to limit the value of hijacked sessions.

bash

# Example: list and deactivate the vulnerable plugin using WP-CLI
wp plugin list --name=mapsvg-lite-interactive-vector-maps --fields=name,status,version
wp plugin deactivate mapsvg-lite-interactive-vector-maps