CVE-2025-27313 Overview
CVE-2025-27313 is a reflected cross-site scripting (XSS) vulnerability in the Bernd Altmeier Google Maps GPX Viewer WordPress plugin. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. It affects all plugin versions up to and including 3.6.
Attackers can craft malicious URLs that execute arbitrary JavaScript in a victim's browser when the link is clicked. Because the issue produces a scope change, code runs in the WordPress site's origin and can target authenticated administrators.
Critical Impact
Successful exploitation enables session hijacking, credential theft, and administrative actions performed in the context of an authenticated WordPress user.
Affected Products
- Bernd Altmeier Google Maps GPX Viewer plugin for WordPress
- All versions from initial release through 3.6
- WordPress sites with the google-maps-gpx-viewer plugin installed and active
Discovery Timeline
- 2025-04-17 - CVE-2025-27313 published to NVD
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2025-27313
Vulnerability Analysis
The Google Maps GPX Viewer plugin reflects user-controlled input into rendered HTML without sufficient encoding or sanitization. An attacker who lures a target into clicking a crafted link triggers JavaScript execution in the browser.
The vulnerability requires user interaction but no authentication. The CVSS scope change indicates that exploitation can affect resources beyond the vulnerable component, such as the WordPress administrative session. The Exploit Prediction Scoring System places this issue in the upper tier of WordPress plugin XSS issues by likelihood of near-term exploitation.
Reflected XSS in WordPress plugins is routinely chained with social engineering to compromise administrator accounts. Once an administrator session is captured or abused, attackers can install backdoored plugins, create rogue users, or modify site content.
Root Cause
The plugin fails to apply proper output encoding when echoing request parameters back into HTML responses. Standard WordPress sanitization helpers such as esc_html(), esc_attr(), or wp_kses() were not applied consistently to the affected input paths.
Attack Vector
Attackers craft a URL pointing to a vulnerable plugin endpoint that includes a JavaScript payload in a query parameter. The victim must click the link or visit an attacker-controlled page that triggers the request. The reflected payload executes within the WordPress site's origin, enabling cookie theft, CSRF against authenticated endpoints, or in-browser keylogging.
Refer to the Patchstack Vulnerability Report for additional technical context.
Detection Methods for CVE-2025-27313
Indicators of Compromise
- Web server access logs containing requests to google-maps-gpx-viewer endpoints with URL-encoded <script>, onerror=, or javascript: payloads
- Unexpected administrative actions performed from administrator sessions following a click on an external link
- Outbound requests from administrator browsers to unfamiliar domains immediately after viewing plugin-rendered pages
Detection Strategies
- Inspect HTTP query strings for reflected XSS signatures targeting the plugin's parameters and correlate with Referer headers from external sources
- Deploy a web application firewall rule set that blocks common XSS payloads against /wp-content/plugins/google-maps-gpx-viewer/ paths
- Review WordPress audit logs for new administrator accounts, plugin installations, or theme edits that follow suspicious page visits
Monitoring Recommendations
- Enable verbose access logging for all wp-content/plugins/google-maps-gpx-viewer/ requests and forward to a SIEM for analysis
- Alert on HTTP responses that echo request parameters containing script-like content
- Monitor administrator session creation and source IP changes for accounts with plugin management privileges
How to Mitigate CVE-2025-27313
Immediate Actions Required
- Deactivate the Google Maps GPX Viewer plugin on any site running version 3.6 or earlier until a patched release is verified
- Force password resets and session invalidation for WordPress administrators if suspicious activity is observed
- Apply WAF rules blocking XSS payloads to plugin request paths
Patch Information
At the time of NVD publication, the vendor had not released a fixed version addressing CVE-2025-27313 in the Google Maps GPX Viewer plugin tree. Site operators should monitor the Patchstack advisory and the WordPress.org plugin page for an updated release beyond version 3.6.
Workarounds
- Replace the plugin with a maintained alternative that supports GPX rendering on WordPress
- Restrict access to plugin-rendered pages with authentication or IP allow-listing where feasible
- Enforce a strict Content Security Policy that disallows inline scripts to limit the impact of reflected XSS
- Train administrators to avoid clicking unsolicited links to their own WordPress sites
# Example Content Security Policy header to mitigate reflected XSS
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.
