CVE-2024-54240 Overview
CVE-2024-54240 is a reflected Cross-Site Scripting (XSS) vulnerability in the Blaze Online eParcel for WooCommerce WordPress plugin. The flaw affects all versions of blaze-online-eparcel-for-woocommerce up to and including 1.3.3. The vulnerability stems from improper neutralization of user input during web page generation, classified as [CWE-79]. Attackers can craft malicious URLs that execute arbitrary JavaScript in a victim's browser when the victim clicks the link. Successful exploitation can lead to session theft, credential harvesting, or unauthorized actions within the WooCommerce admin context.
Critical Impact
Attackers can execute arbitrary JavaScript in the context of a victim's browser session, enabling theft of authentication cookies and unauthorized actions against the WooCommerce store.
Affected Products
- Blaze Online eParcel for WooCommerce plugin versions up to and including 1.3.3
- WordPress sites running WooCommerce with the affected plugin installed
- All deployments using blaze-online-eparcel-for-woocommerce without the vendor patch
Discovery Timeline
- 2024-12-13 - CVE-2024-54240 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-54240
Vulnerability Analysis
The vulnerability is a reflected Cross-Site Scripting flaw in the Blaze Online eParcel for WooCommerce plugin. The plugin fails to sanitize and encode user-supplied input before reflecting it back in HTTP responses. An attacker constructs a URL containing JavaScript payloads in request parameters processed by the plugin. When a victim clicks the malicious link, the server reflects the unsanitized payload into the rendered HTML page. The browser then executes the injected script in the victim's authenticated session context.
Exploitation requires user interaction, typically through social engineering or phishing. The scope is changed because injected scripts can affect resources beyond the vulnerable component, including the WordPress admin session. The reflected payload can read cookies, manipulate the DOM, or issue authenticated requests on behalf of the victim.
Root Cause
The root cause is missing or insufficient output encoding of request parameters processed by the plugin. The plugin echoes user-controlled values into HTML responses without applying WordPress sanitization functions such as esc_html(), esc_attr(), or wp_kses(). This omission allows raw HTML and JavaScript characters to break out of their intended context.
Attack Vector
The attack vector is network-based and requires user interaction. An attacker crafts a URL containing JavaScript in a vulnerable parameter handled by the plugin endpoint. The attacker delivers this URL through phishing emails, malicious websites, or compromised forums targeting WooCommerce store administrators or customers. When the victim opens the link in a browser session authenticated to the WordPress site, the injected JavaScript executes with that session's privileges. See the Patchstack advisory for additional technical context.
Detection Methods for CVE-2024-54240
Indicators of Compromise
- HTTP requests to WordPress endpoints containing URL-encoded <script> tags, javascript: schemes, or event handlers such as onerror= and onload=
- Referrer headers pointing to external phishing infrastructure preceding requests to the affected plugin
- Outbound HTTP requests from administrator browsers to attacker-controlled domains shortly after WooCommerce admin activity
- Unexpected session cookie transmissions to unknown external hosts originating from admin sessions
Detection Strategies
- Inspect web server access logs for query strings containing reflected XSS payload patterns targeting the blaze-online-eparcel-for-woocommerce plugin paths
- Deploy a Web Application Firewall (WAF) ruleset that flags common XSS vectors against WordPress plugin endpoints
- Monitor browser-side Content Security Policy (CSP) violation reports for inline script execution attempts on store admin pages
Monitoring Recommendations
- Centralize WordPress and reverse proxy access logs in a SIEM and alert on suspicious query parameters matching XSS signatures
- Track plugin version inventory across WordPress sites and alert when versions at or below 1.3.3 of the affected plugin are detected
- Monitor administrator account activity for unusual configuration changes or new user creation following inbound external links
How to Mitigate CVE-2024-54240
Immediate Actions Required
- Identify all WordPress sites running the Blaze Online eParcel for WooCommerce plugin and confirm the installed version
- Update the plugin to a version newer than 1.3.3 once the vendor publishes a fixed release
- Restrict administrator browsing habits and require administrators to avoid clicking untrusted links while authenticated to WordPress
- Rotate WordPress administrator credentials and invalidate active sessions if exploitation is suspected
Patch Information
At the time of NVD publication, the advisory lists affected versions from n/a through <= 1.3.3. Administrators should monitor the Patchstack advisory and the official WordPress plugin repository for an updated release that addresses the reflected XSS issue.
Workarounds
- Deactivate and remove the Blaze Online eParcel for WooCommerce plugin until a patched version is available
- Deploy a WAF with rules blocking reflected XSS payloads on requests targeting the plugin's endpoints
- Enforce a strict Content Security Policy on the WordPress site to limit inline script execution and restrict script sources
- Require administrators to use a dedicated browser profile that is not used for general web browsing
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
