CVE-2024-54335 Overview
CVE-2024-54335 is a reflected Cross-Site Scripting (XSS) vulnerability in the ImmoSoft ImmoToolBox Connect WordPress plugin (immotoolbox-connect). The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. All plugin versions up to and including 1.3.3 are affected. An attacker can craft a malicious URL containing JavaScript payloads that execute in the victim's browser when clicked. Successful exploitation runs in the context of the targeted site, enabling session theft, credential harvesting, and arbitrary actions on behalf of the victim. The vulnerability requires user interaction but no authentication, and the scope is changed because the injected script can affect resources beyond the vulnerable component.
Critical Impact
Attackers can execute arbitrary JavaScript in victim browsers via crafted links, leading to session hijacking and unauthorized actions in WordPress sites running ImmoToolBox Connect ≤ 1.3.3.
Affected Products
- ImmoSoft ImmoToolBox Connect WordPress plugin (immotoolbox-connect)
- All versions from unspecified initial release through 1.3.3
- WordPress sites with the plugin installed and active
Discovery Timeline
- 2024-12-13 - CVE-2024-54335 published to the National Vulnerability Database (NVD)
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2024-54335
Vulnerability Analysis
The vulnerability is a reflected XSS flaw rooted in improper neutralization of input during web page generation. The plugin echoes user-controlled parameters back into HTML responses without applying context-appropriate output encoding or input sanitization. An attacker constructs a URL containing a JavaScript payload in a vulnerable parameter and tricks an authenticated or unauthenticated user into clicking it. The browser then renders the injected script within the trust context of the WordPress site.
Because the attack succeeds with a single user interaction, phishing emails, social media posts, and malicious comments on third-party sites are viable delivery channels. The changed scope means the script can act against site components outside the plugin itself, such as the WordPress admin session if an administrator is the victim.
Root Cause
The root cause is missing or insufficient sanitization of HTTP request parameters before they are reflected into rendered HTML. Functions such as esc_html(), esc_attr(), or wp_kses() are either not applied or applied in the wrong output context. This allows raw <script> tags, event handlers, or javascript: URIs to reach the DOM.
Attack Vector
The attack vector is network-based and requires user interaction. The attacker delivers a crafted link pointing to an endpoint of the vulnerable plugin. When the victim clicks the link, the reflected payload executes in their browser session. Refer to the Patchstack Vulnerability Report for technical specifics on the affected parameter.
// No verified proof-of-concept code is publicly available.
// The vulnerability is triggered by sending a crafted URL containing
// JavaScript payloads in unsanitized request parameters processed by
// the immotoolbox-connect plugin.
Detection Methods for CVE-2024-54335
Indicators of Compromise
- HTTP request logs containing URL parameters with <script>, onerror=, onload=, or javascript: strings targeting plugin endpoints
- Unexpected outbound requests from administrator browsers to attacker-controlled domains shortly after clicking external links
- Anomalous WordPress administrative actions performed from legitimate accounts without corresponding console activity
Detection Strategies
- Inspect web server access logs for requests to immotoolbox-connect paths containing URL-encoded HTML or JavaScript metacharacters
- Deploy a Web Application Firewall (WAF) rule that flags reflected payloads matching common XSS signatures on plugin routes
- Correlate referrer headers with phishing campaign indicators to identify targeted users
Monitoring Recommendations
- Forward WordPress, reverse proxy, and WAF logs to a centralized analytics platform for query-based hunting on plugin URIs
- Alert on administrator session anomalies such as new user creation or plugin changes following external link clicks
- Track plugin version inventory across WordPress estates to confirm patch coverage
How to Mitigate CVE-2024-54335
Immediate Actions Required
- Identify all WordPress sites with the immotoolbox-connect plugin installed and confirm installed versions
- Disable the plugin on any site running version 1.3.3 or earlier until a patched release is verified
- Review administrator accounts and active sessions for signs of unauthorized activity
Patch Information
No fixed version is listed in the NVD record at the time of publication. Monitor the Patchstack Vulnerability Report and the vendor's plugin page for an updated release beyond 1.3.3. Apply the patch across all WordPress instances once available.
Workarounds
- Deactivate and remove the ImmoToolBox Connect plugin until a fixed version is released
- Enforce a strict Content Security Policy (CSP) that disallows inline script execution to limit XSS impact
- Configure WAF rules to block requests to plugin endpoints containing HTML or JavaScript metacharacters in query parameters
# Example WordPress CLI command to deactivate the vulnerable plugin
wp plugin deactivate immotoolbox-connect --all-network
wp plugin status immotoolbox-connect
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
