CVE-2025-47557 Overview
CVE-2025-47557 is a stored Cross-Site Scripting (XSS) vulnerability in the RomanCode MapSVG plugin for WordPress. The flaw affects all versions up to and including 8.5.31. The plugin fails to properly neutralize user-supplied input during web page generation, allowing attackers with low-privileged authenticated access to inject persistent JavaScript payloads. The stored payload executes in the browser of any user who views the affected page, including administrators. This vulnerability is tracked under CWE-79.
Critical Impact
Authenticated attackers can inject persistent JavaScript that runs in administrator sessions, enabling account takeover, session theft, and unauthorized modification of WordPress content.
Affected Products
- RomanCode MapSVG plugin for WordPress
- All versions from initial release through 8.5.31
- WordPress sites with the MapSVG plugin installed and activated
Discovery Timeline
- 2025-05-16 - CVE-2025-47557 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-47557
Vulnerability Analysis
The vulnerability stems from improper neutralization of user input during web page generation within the MapSVG plugin. When authenticated users submit data through plugin-exposed interfaces, the input is stored in the WordPress database without adequate sanitization or output encoding.
When the stored data is later rendered in a page or administrative view, the browser interprets the injected markup as executable code. This produces a stored XSS condition that persists across sessions and users. Exploitation requires user interaction, such as an administrator viewing a page containing the injected content.
The scope-changed nature of the flaw means the injected script can affect resources beyond the vulnerable component, including the WordPress admin interface. Successful exploitation can lead to session hijacking, credential theft, forced administrative actions, or the delivery of secondary payloads to site visitors.
Root Cause
The root cause is missing or insufficient input sanitization and output encoding in the MapSVG plugin. User-controlled fields accepted by the plugin are neither stripped of active markup on write nor properly escaped when rendered as HTML. This maps directly to CWE-79: Improper Neutralization of Input During Web Page Generation.
Attack Vector
Exploitation requires network access to the target WordPress site and an authenticated account with at least low-privilege access to a MapSVG input surface. The attacker submits a crafted payload containing HTML or JavaScript. The payload is stored and later executed when another user, typically a higher-privileged administrator, loads the affected view. Full technical details are documented in the Patchstack XSS Vulnerability Advisory.
Detection Methods for CVE-2025-47557
Indicators of Compromise
- Unexpected <script> tags, on* event handlers, or javascript: URIs stored in MapSVG configuration or map records within the WordPress database
- Outbound requests from administrator browsers to unfamiliar domains shortly after loading pages containing MapSVG content
- Unauthorized creation of WordPress administrator accounts or changes to user roles following MapSVG page views
Detection Strategies
- Query the wp_options and MapSVG plugin tables for stored values containing HTML event handlers, <script> tags, or encoded script payloads
- Enable and review WordPress audit logging for content updates to MapSVG entries by low-privileged users
- Deploy a Web Application Firewall (WAF) rule set that inspects POST requests to MapSVG endpoints for XSS signatures
Monitoring Recommendations
- Monitor administrative sessions for anomalous cookie access, session token exfiltration, or unexpected AJAX calls originating from plugin-rendered pages
- Track plugin version inventory across all WordPress installations and alert on MapSVG versions at or below 8.5.31
- Correlate authentication logs with content modification events to identify low-privileged accounts injecting HTML into MapSVG fields
How to Mitigate CVE-2025-47557
Immediate Actions Required
- Update the RomanCode MapSVG plugin to a version later than 8.5.31 as soon as a patched release is available from the vendor
- Audit all existing MapSVG records for stored HTML or JavaScript payloads and remove any unauthorized content
- Restrict which user roles can create or edit MapSVG content until the plugin is patched
- Force a password reset and session invalidation for administrator accounts that viewed potentially malicious MapSVG content
Patch Information
Refer to the Patchstack XSS Vulnerability Advisory for the latest patch status. Apply the vendor-supplied update through the WordPress plugin management interface once available. Verify the installed version reports higher than 8.5.31 after upgrade.
Workarounds
- Deactivate the MapSVG plugin until a patched version is installed if the plugin is not business-critical
- Deploy a WAF rule blocking script tags, event handler attributes, and javascript: schemes in requests targeting MapSVG admin endpoints
- Enforce a strict Content Security Policy (CSP) that disallows inline scripts on WordPress administrative pages to reduce impact if exploitation occurs
# Content Security Policy header example for WordPress admin
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
