CVE-2024-47320: WS Form LITE Stored XSS Vulnerability

CVE-2024-47320 Overview

CVE-2024-47320 is a stored Cross-Site Scripting (XSS) vulnerability affecting the WS Form LITE WordPress plugin developed by Mark Westguard. The flaw stems from improper neutralization of input during web page generation [CWE-79]. All plugin versions up to and including 1.9.238 are affected. An attacker can inject malicious script content that is persistently stored and rendered to users who view the affected pages. Exploitation requires user interaction and results in a scope change, allowing attackers to impact resources beyond the vulnerable component. The vulnerability targets WordPress sites that use WS Form LITE for building and managing web forms.

Critical Impact
Successful exploitation enables attackers to execute arbitrary JavaScript in the browsers of site visitors and administrators, potentially leading to session theft, credential harvesting, and unauthorized actions performed under privileged user contexts.

Affected Products

Mark Westguard WS Form LITE WordPress plugin
All versions from initial release through 1.9.238
WordPress installations with WS Form LITE active

Discovery Timeline

2024-10-06 - CVE-2024-47320 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2024-47320

Vulnerability Analysis

The vulnerability is a stored XSS issue in the WS Form LITE plugin. WS Form LITE accepts user-supplied input through form fields or plugin configuration parameters and stores that input in the WordPress database. When the stored content is later rendered in a web page, the plugin fails to sanitize or encode the output appropriately. This allows attacker-controlled HTML and JavaScript to execute in the context of the rendering page.

Stored XSS is more impactful than reflected XSS because the payload persists across sessions and affects every user who loads the affected page. In the case of WS Form LITE, the payload can reach site administrators who review submitted form data through the WordPress admin interface.

Root Cause

The root cause is missing or inadequate output encoding when user-controlled data is written into HTML contexts. The plugin does not apply WordPress sanitization functions such as esc_html(), esc_attr(), or wp_kses() consistently across all input handling paths up to and including version 1.9.238.

Attack Vector

The attack is delivered over the network and requires user interaction to trigger payload execution. An attacker submits crafted input containing JavaScript through a vector exposed by WS Form LITE. The payload is stored in the database. When a victim, typically a site administrator or another authenticated user, views the rendered output, the injected script executes in their browser session. This vulnerability is categorized as Cross-Site Scripting (XSS) under [CWE-79]. Refer to the Patchstack Vulnerability Advisory for additional technical context.

Detection Methods for CVE-2024-47320

Indicators of Compromise

Unexpected <script> tags, event handlers (onerror, onload), or JavaScript URIs stored in WS Form LITE form submission records
Outbound browser requests from administrator sessions to unknown external domains after viewing form data
New or modified WordPress administrator accounts created shortly after form submissions are reviewed

Detection Strategies

Inspect WordPress database tables associated with WS Form LITE for stored content containing HTML tags or JavaScript syntax
Review web server access logs for suspicious POST requests to WS Form LITE endpoints containing encoded script payloads
Monitor WordPress audit logs for administrative activity that follows the rendering of form submission pages

Monitoring Recommendations

Enable Content Security Policy (CSP) headers and report violations to a centralized logging system
Deploy a web application firewall with rules that identify common XSS payload patterns targeting WordPress plugins
Track the installed version of WS Form LITE across all WordPress sites and alert when versions at or below 1.9.238 are detected

How to Mitigate CVE-2024-47320

Immediate Actions Required

Update WS Form LITE to a version released after 1.9.238 that contains the vendor fix
Audit existing form submissions and stored plugin data for previously injected payloads
Rotate WordPress administrator credentials if signs of XSS execution against admin sessions are identified

Patch Information

Users must upgrade WS Form LITE to a patched release beyond version 1.9.238. Consult the Patchstack Vulnerability Advisory for current fixed version information and vendor guidance.

Workarounds

Restrict access to WS Form LITE form-handling endpoints using a web application firewall until patching is completed
Apply a strict Content Security Policy that disallows inline scripts on pages rendering WS Form LITE content
Limit which user roles can submit content to WS Form LITE forms, reducing the population of potential attackers

bash

# Example CSP header to reduce XSS impact on WordPress pages
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"