CVE-2024-49663 Overview
CVE-2024-49663 is a reflected cross-site scripting (XSS) vulnerability in the uCAT – Next Story WordPress plugin developed by elenkadark. The flaw affects all plugin versions up to and including 2.0.0. Attackers can inject malicious scripts that execute in a victim's browser when the victim clicks a crafted link. The vulnerability is tracked under CWE-79 for improper neutralization of input during web page generation.
Critical Impact
Successful exploitation allows attackers to execute arbitrary JavaScript in the context of the victim's session, enabling session theft, credential harvesting, and unauthorized actions on behalf of authenticated WordPress users.
Affected Products
- uCAT – Next Story WordPress plugin versions up to and including 2.0.0
- WordPress sites running the vulnerable ucat-next-story plugin
- Vendor: elenkadark (elenazhyvohliad)
Discovery Timeline
- 2024-10-29 - CVE-2024-49663 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-49663
Vulnerability Analysis
The uCAT – Next Story plugin fails to sanitize user-supplied input before reflecting it in HTTP responses. An attacker crafts a URL containing a malicious payload and delivers it to a target user through phishing, social engineering, or a malicious link. When the victim loads the URL, the server reflects the attacker's payload directly into the rendered page, and the browser executes it in the site's origin.
Because the scope is changed (S:C in the CVSS vector), the injected script can access resources beyond the vulnerable component, including session cookies and Document Object Model (DOM) content of the WordPress site. User interaction is required, which limits mass exploitation but not targeted attacks against administrators.
Root Cause
The root cause is missing output encoding and input validation in one or more plugin request handlers. Reflected parameters are echoed back into HTML responses without HTML entity encoding or contextual escaping, allowing <script> tags and event handler attributes to survive into the rendered page.
Attack Vector
Exploitation occurs over the network without authentication. An attacker crafts a URL to a vulnerable endpoint of the plugin with a payload embedded in a reflected parameter. The attacker distributes the URL to a WordPress user or administrator. When the target clicks the link, the payload runs in the browser and can perform any action the victim is authorized to perform on the site.
Refer to the Patchstack Vulnerability Report for advisory details.
Detection Methods for CVE-2024-49663
Indicators of Compromise
- HTTP requests to ucat-next-story plugin endpoints containing URL-encoded <script>, javascript:, or onerror= payloads in query parameters
- Server access logs showing GET requests with unusually long or entity-encoded query strings targeting plugin routes
- Referer headers from external domains linking to WordPress admin or plugin URLs with suspicious parameters
Detection Strategies
- Deploy a Web Application Firewall (WAF) with signatures for reflected XSS payloads targeting WordPress plugins
- Inspect web server logs for query parameters containing HTML tags or JavaScript event handlers directed at plugin endpoints
- Correlate outbound requests from user browsers to attacker-controlled domains immediately after visits to plugin URLs
Monitoring Recommendations
- Enable verbose access logging on the WordPress front-end and forward logs to a central analytics platform
- Alert on repeated hits to plugin endpoints from a single source with encoded script payloads
- Monitor administrator account activity for unexpected content changes, plugin installations, or user role modifications following an XSS attempt
How to Mitigate CVE-2024-49663
Immediate Actions Required
- Deactivate and remove the uCAT – Next Story plugin until a patched release is available
- Restrict administrator access to trusted networks and require multi-factor authentication for WordPress logins
- Educate administrators to avoid clicking untrusted links referencing site URLs with unusual parameters
Patch Information
No vendor patch is referenced in the published advisory. The vulnerability affects all versions up to and including 2.0.0. Review the Patchstack advisory for updates on fixed versions and replace the plugin when a patched release is issued.
Workarounds
- Uninstall the plugin and select an actively maintained alternative that provides equivalent functionality
- Deploy a WAF rule that blocks HTTP requests to plugin endpoints containing script tags or JavaScript event handlers in parameters
- Apply a strict Content Security Policy (CSP) that disallows inline script execution to reduce impact of reflected payloads
# Example Content-Security-Policy header to reduce reflected XSS impact
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.
