CVE-2024-56027: Leads CRM Reflected XSS Vulnerability

CVE-2024-56027 Overview

CVE-2024-56027 is a reflected cross-site scripting (XSS) vulnerability in the bizswoop Leads CRM WordPress plugin. The flaw affects all versions up to and including 2.0.13. The plugin fails to neutralize user-supplied input during web page generation, allowing attackers to inject arbitrary JavaScript into responses rendered by the victim's browser. The issue is tracked under CWE-79 and was published to the National Vulnerability Database on January 2, 2025.

Critical Impact
Attackers can execute arbitrary scripts in a victim's browser session, enabling session theft, credential harvesting, and unauthorized actions in the WordPress administrative context.

Affected Products

bizswoop Leads CRM WordPress plugin (leads-crm)
All versions from n/a through 2.0.13
WordPress sites with the vulnerable plugin installed and active

Discovery Timeline

2025-01-02 - CVE-2024-56027 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2024-56027

Vulnerability Analysis

The Leads CRM plugin processes request parameters and reflects them into HTTP responses without proper output encoding or sanitization. An attacker crafts a malicious URL containing JavaScript payloads in vulnerable parameters. When a victim clicks the link, the payload executes in the browser under the origin of the WordPress site hosting the plugin.

The vulnerability has a scope change characteristic, meaning the injected script can affect resources beyond the vulnerable component itself. User interaction is required, as the victim must click the attacker-supplied link. Successful exploitation impacts confidentiality, integrity, and availability of the affected session.

Root Cause

The root cause is improper neutralization of input during web page generation [CWE-79]. The plugin does not apply WordPress sanitization functions such as esc_html(), esc_attr(), or wp_kses() to user-controlled values before echoing them into HTML output. Reflected parameters retain their raw form, allowing HTML and JavaScript syntax to break out of the intended context.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker constructs a URL targeting the vulnerable endpoint with a JavaScript payload embedded in a reflected parameter. The attacker delivers the link through phishing emails, social media, or compromised sites. When an authenticated WordPress administrator follows the link, the script runs with the privileges of that session.

The vulnerability manifests as direct reflection of unsanitized request data. See the Patchstack Vulnerability Report for technical disclosure details.

Detection Methods for CVE-2024-56027

Indicators of Compromise

HTTP requests to Leads CRM plugin endpoints containing <script>, javascript:, or encoded variants in query parameters
Web server access logs showing unusual referrer chains directing users to plugin URLs with long query strings
Outbound requests from administrator browsers to attacker-controlled domains shortly after clicking external links
Unexpected creation of WordPress administrator accounts or modification of plugin settings following a phishing campaign

Detection Strategies

Inspect WordPress access logs for requests to leads-crm endpoints containing HTML or JavaScript metacharacters
Deploy a Web Application Firewall (WAF) with rules to flag reflected payloads in plugin query parameters
Correlate browser telemetry from administrator endpoints with WordPress request logs to identify suspicious link follows
Monitor WordPress audit logs for privileged actions occurring without corresponding interactive login activity

Monitoring Recommendations

Enable verbose HTTP request logging on the WordPress front-end and reverse proxy layer
Forward web and endpoint telemetry to a centralized SIEM for cross-source correlation
Alert on administrator sessions making unexpected wp-admin configuration changes after external referrer traffic
Track plugin version inventory across all WordPress installations to identify systems still running 2.0.13 or earlier

How to Mitigate CVE-2024-56027

Immediate Actions Required

Identify all WordPress sites running the bizswoop Leads CRM plugin and confirm installed versions
Deactivate the plugin on any site running version 2.0.13 or earlier until a patched release is verified
Rotate WordPress administrator credentials and invalidate active sessions on affected sites
Educate administrators against clicking unsolicited links targeting their WordPress installations

Patch Information

No fixed version is identified in the published advisory at the time of NVD entry. Monitor the Patchstack Vulnerability Report and the WordPress plugin repository for an updated release addressing the XSS flaw. Apply the patched version as soon as it becomes available.

Workarounds

Restrict access to WordPress administrative pages by IP allowlist at the web server or WAF
Configure a Content Security Policy (CSP) header that disallows inline scripts and untrusted origins
Deploy WAF signatures that block reflected XSS payloads in requests targeting leads-crm parameters
Require administrators to use isolated browsers or browser profiles when managing WordPress sites

bash

# Example nginx Content Security Policy header to reduce XSS impact
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'" always;