CVE-2026-56011 Overview
CVE-2026-56011 is an unauthenticated Cross-Site Scripting (XSS) vulnerability affecting the MapPress Maps for WordPress plugin in versions 2.97.3 and earlier. The flaw is classified under CWE-79, Improper Neutralization of Input During Web Page Generation. Attackers can inject malicious scripts that execute in the browser of any user who interacts with a crafted request or link. Because exploitation requires no authentication, the attack surface extends to any WordPress site running the vulnerable plugin.
Critical Impact
Unauthenticated attackers can execute arbitrary JavaScript in victim browsers, enabling session theft, credential harvesting, and administrative account takeover through crafted links or requests.
Affected Products
- MapPress Maps for WordPress plugin versions <= 2.97.3
- WordPress sites with the vulnerable plugin installed and activated
- Any WordPress deployment exposing the affected plugin endpoints to unauthenticated users
Discovery Timeline
- 2026-06-26 - CVE-2026-56011 published to NVD
- 2026-06-26 - Last updated in NVD database
Technical Details for CVE-2026-56011
Vulnerability Analysis
The vulnerability stems from improper neutralization of user-supplied input rendered within the MapPress Maps for WordPress plugin. The plugin fails to sanitize or encode input before including it in HTML output. An unauthenticated attacker can supply crafted payloads that the plugin reflects back to the browser as executable script content.
Exploitation requires user interaction, typically clicking a crafted link or visiting an attacker-controlled page that triggers the request. Once executed, the injected script runs in the security context of the affected WordPress site. Attackers can leverage this to hijack authenticated sessions, perform actions on behalf of administrators, or redirect visitors to malicious infrastructure.
The scope is marked as changed, indicating that the executed script can affect resources beyond the vulnerable component, such as the wider WordPress admin session. Confidentiality, integrity, and availability impacts are all rated low individually, but chained abuse against a logged-in administrator can escalate to full site compromise.
Root Cause
The root cause is missing output encoding and input validation on parameters processed by the MapPress plugin. User-controlled values reach an HTML rendering context without being escaped through WordPress functions such as esc_html(), esc_attr(), or wp_kses(). This allows raw <script> tags or event-handler attributes to survive into the final response.
Attack Vector
The attack is network-based and requires user interaction. An attacker crafts a URL or form submission containing a JavaScript payload targeting a vulnerable MapPress endpoint. The victim, often an authenticated WordPress administrator, follows the link or is coerced through phishing or social engineering. The plugin reflects the payload into the response, and the browser executes it under the site's origin.
No verified exploit code is publicly available. Refer to the Patchstack WordPress Vulnerability Advisory for technical specifics.
Detection Methods for CVE-2026-56011
Indicators of Compromise
- Web server access logs containing requests to MapPress plugin endpoints with <script>, onerror=, onload=, or javascript: substrings in query parameters.
- Unexpected outbound requests from administrator browsers to unfamiliar domains shortly after visiting the WordPress admin panel.
- New or modified administrator accounts, plugins, or theme files created without a corresponding change management record.
Detection Strategies
- Inspect HTTP request parameters submitted to MapPress endpoints for URL-encoded or obfuscated JavaScript payloads.
- Correlate authenticated admin session activity with anomalous DOM events or unexpected AJAX calls in browser telemetry.
- Deploy a Web Application Firewall (WAF) with rules targeting reflected XSS patterns against WordPress plugin paths.
Monitoring Recommendations
- Enable verbose logging on the WordPress site and forward logs to a centralized analytics platform for query and alerting.
- Monitor the MapPress plugin version installed across managed WordPress instances and alert on versions at or below 2.97.3.
- Track referrer patterns for admin-area requests to identify externally initiated navigation to sensitive endpoints.
How to Mitigate CVE-2026-56011
Immediate Actions Required
- Update the MapPress Maps for WordPress plugin to a version newer than 2.97.3 as soon as a patched release is available.
- Audit administrator accounts and recent site changes for signs of unauthorized activity.
- Enforce a strict Content Security Policy (CSP) on the WordPress site to limit inline script execution.
Patch Information
Refer to the Patchstack WordPress Vulnerability Advisory for the latest guidance on fixed versions and remediation steps. Apply the vendor-supplied update through the WordPress plugin management interface or via WP-CLI once available.
Workarounds
- Deactivate the MapPress Maps for WordPress plugin until a patched version is installed if map functionality is not business-critical.
- Restrict access to WordPress administrative pages using IP allowlists at the web server or WAF layer.
- Enable virtual patching rules in a WAF to block requests containing script tags or event-handler attributes targeting MapPress endpoints.
# Configuration example
wp plugin update mappress-google-maps-for-wordpress
wp plugin deactivate mappress-google-maps-for-wordpress # if patch not yet available
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
