CVE-2024-49662: Webgensis Simple Load More XSS Vulnerability

CVE-2024-49662 Overview

CVE-2024-49662 is a reflected Cross-Site Scripting (XSS) vulnerability in the Webgensis Simple Load More plugin for WordPress. The flaw affects all versions up to and including 1.0. The plugin fails to properly neutralize user-supplied input during web page generation, allowing attackers to inject malicious scripts that execute in the victim's browser context.

The vulnerability is categorized under [CWE-79] (Improper Neutralization of Input During Web Page Generation). Exploitation requires user interaction, typically by tricking an authenticated user into clicking a crafted URL.

Critical Impact

Successful exploitation enables session hijacking, credential theft, and unauthorized actions performed in the context of the victim's WordPress session.

Affected Products

• Webgensis Simple Load More WordPress plugin, all versions through 1.0
• WordPress sites with the simple-load-more plugin installed and active
• Any user session interacting with a vulnerable endpoint on the affected site

Discovery Timeline

• 2024-10-29 - CVE-2024-49662 published to the National Vulnerability Database
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-49662

Vulnerability Analysis

The Simple Load More plugin reflects user-controlled input back into HTTP responses without adequate output encoding or input sanitization. When a victim clicks a crafted link, the browser renders the injected payload as executable JavaScript within the trusted origin of the WordPress site.

Because the CVSS scope is changed, the injected script can affect resources beyond the vulnerable component. The attack does not require authentication, only that a target user follows an attacker-supplied URL.

Root Cause

The root cause is missing or insufficient sanitization of request parameters before they are echoed into the HTML response. The plugin trusts input received from the client and inserts it into the DOM without contextual escaping. This design flaw maps directly to [CWE-79], the standard category for reflected XSS.

Attack Vector

An attacker crafts a URL containing a JavaScript payload in a parameter processed by the plugin. The attacker distributes the link through phishing, social media, or malicious advertising. When a victim, particularly an authenticated WordPress administrator, opens the link, the payload executes with the victim's privileges.

Attackers commonly use this class of vulnerability to steal session cookies, perform CSRF-style actions, deliver browser exploits, or redirect users to attacker-controlled sites. Technical exploitation details are documented in the Patchstack Vulnerability Report.

Detection Methods for CVE-2024-49662

Indicators of Compromise

• Web server access logs containing request parameters with HTML tags, <script> fragments, javascript: URIs, or encoded equivalents targeting the simple-load-more plugin endpoints
• Referrer headers originating from unfamiliar domains that lead to plugin URLs with unusual query strings
• Unexpected administrator account changes or plugin installations following user clicks on external links

Detection Strategies

• Inspect WordPress request logs for parameters containing script tags, event handlers such as onerror= or onload=, and URL-encoded payloads such as %3Cscript%3E
• Deploy a web application firewall rule to flag reflected XSS patterns aimed at /wp-content/plugins/simple-load-more/ endpoints
• Correlate authenticated administrator activity with inbound requests carrying suspicious query parameters

Monitoring Recommendations

• Enable verbose HTTP request logging on the WordPress front end and forward logs to a central analytics platform
• Alert on outbound requests from browsers to unknown domains immediately after users visit plugin endpoints, indicating potential cookie exfiltration
• Track plugin inventory and version data across all WordPress instances to identify unpatched Simple Load More installations

How to Mitigate CVE-2024-49662

Immediate Actions Required

• Deactivate and remove the Simple Load More plugin from all WordPress sites until a fixed version is available
• Rotate WordPress administrator credentials and invalidate active sessions if suspicious activity is observed
• Enforce a Content Security Policy (CSP) that restricts inline script execution across the site

Patch Information

No vendor patch is referenced in the available advisory. The vulnerability affects all versions through 1.0. Consult the Patchstack Vulnerability Report for the latest remediation guidance and monitor the plugin's WordPress repository page for updates.

Workarounds

• Replace Simple Load More with a maintained alternative plugin that provides equivalent pagination functionality
• Deploy a virtual patch through a WordPress-aware WAF to block requests containing reflected XSS payloads targeting the plugin
• Train administrators to avoid clicking untrusted links, particularly while authenticated to the WordPress admin console

# Example WAF rule fragment to block common reflected XSS payloads
# targeting the Simple Load More plugin endpoints
SecRule REQUEST_URI "@contains /wp-content/plugins/simple-load-more/" \
  "chain,deny,status:403,id:1004962,msg:'Reflected XSS attempt against Simple Load More'"
SecRule ARGS "@rx (?i)(<script|javascript:|onerror=|onload=|%3Cscript)" "t:none"