CVE-2024-56010: Device Detector Reflected XSS Vulnerability

CVE-2024-56010 Overview

CVE-2024-56010 is a reflected Cross-Site Scripting (XSS) vulnerability in the Pierre Lannoy Device Detector plugin for WordPress. The flaw affects all versions up to and including 4.2.0. The plugin fails to properly neutralize user-supplied input during web page generation, allowing attackers to inject malicious scripts that execute in a victim's browser. This issue is tracked under CWE-79 and requires user interaction to trigger the payload.

Critical Impact

Attackers can craft malicious URLs that, when clicked by an authenticated user, execute arbitrary JavaScript in the victim's session context, enabling session hijacking, credential theft, and unauthorized actions within the WordPress site.

Affected Products

• Pierre Lannoy Device Detector WordPress plugin
• All versions from initial release through 4.2.0
• WordPress installations with the Device Detector plugin enabled

Discovery Timeline

• 2024-12-18 - CVE-2024-56010 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2024-56010

Vulnerability Analysis

The vulnerability stems from improper neutralization of input during web page generation in the Device Detector WordPress plugin. The plugin reflects user-controlled input back into HTTP responses without adequate sanitization or output encoding. Attackers craft URLs containing JavaScript payloads embedded in query parameters or form fields processed by the plugin.

When a victim clicks the malicious link, the server reflects the payload directly into the rendered page. The browser then executes the injected script in the context of the WordPress site. This scope change is significant because the attacker's payload can interact with content outside the originally vulnerable component, including authenticated session data.

Exploitation requires user interaction, typically through social engineering tactics such as phishing emails or malicious links posted on trusted forums. Successful exploitation results in limited impact to confidentiality, integrity, and availability across an expanded scope.

Root Cause

The root cause is missing or insufficient output encoding when reflecting parameter values into HTML responses. The plugin treats user input as trusted content rather than applying context-aware escaping such as esc_html(), esc_attr(), or wp_kses() provided by the WordPress API. This omission allows attacker-supplied HTML and JavaScript to be parsed and executed by victim browsers.

Attack Vector

The attack vector is network-based and requires no authentication. An attacker constructs a URL containing a malicious script payload targeting a vulnerable endpoint exposed by the Device Detector plugin. The attacker then distributes this URL through phishing campaigns, social media, or comment spam.

When an authenticated administrator or user visits the crafted URL, the injected script executes with the victim's privileges. Refer to the Patchstack Vulnerability Report for additional technical context.

Detection Methods for CVE-2024-56010

Indicators of Compromise

• HTTP requests to Device Detector plugin endpoints containing URL-encoded <script> tags, javascript: URIs, or event handler attributes like onerror= and onload=
• Web server access logs showing suspicious query parameters with HTML entities or base64-encoded JavaScript payloads
• Unexpected outbound requests from administrator browser sessions to attacker-controlled domains following plugin page visits

Detection Strategies

• Inspect WordPress access logs for requests targeting Device Detector plugin paths with parameters containing reflected script content
• Deploy Web Application Firewall (WAF) rules that flag known XSS payload patterns in inbound HTTP requests
• Monitor browser-side Content Security Policy (CSP) violation reports for inline script execution attempts on plugin-rendered pages

Monitoring Recommendations

• Aggregate WordPress, web server, and WAF logs into a centralized analytics platform to correlate reflected XSS attempts across the environment
• Alert on administrator account activity that follows suspicious URL clicks, such as unexpected configuration changes or new user creation
• Track plugin version inventory across WordPress sites to identify instances still running Device Detector 4.2.0 or earlier

How to Mitigate CVE-2024-56010

Immediate Actions Required

• Identify all WordPress installations running the Pierre Lannoy Device Detector plugin and verify the installed version
• Disable or remove the Device Detector plugin until a patched version is installed if no fix is available
• Restrict administrator access to trusted networks and enforce multi-factor authentication on all WordPress administrator accounts

Patch Information

No patched version is referenced in the available advisory data. Administrators should consult the Patchstack Vulnerability Report for the current remediation status and apply any vendor-released update beyond version 4.2.0 immediately upon availability.

Workarounds

• Deploy a WAF with rules that block requests containing common XSS payloads targeting plugin endpoints
• Implement a strict Content Security Policy that disallows inline scripts and limits script sources to trusted origins
• Train administrators and editors to avoid clicking unsolicited links and to verify URLs before authenticating to the WordPress admin console

# Example WAF rule to block reflected XSS payloads in query strings
SecRule ARGS "@rx (?i)(<script|javascript:|onerror=|onload=)" \
    "id:1056010,phase:2,deny,status:403,log,\
    msg:'Potential XSS attempt targeting Device Detector plugin (CVE-2024-56010)'"