CVE-2024-1304: Badger Meter Monitool XSS Vulnerability

CVE-2024-1304 Overview

CVE-2024-1304 is a reflected cross-site scripting (XSS) vulnerability affecting Badger Meter Monitool versions up to and including 4.6.3. The flaw allows a remote attacker to craft a malicious JavaScript payload and deliver it to an authenticated user. Successful exploitation lets the attacker partially hijack the victim's browser session within the Monitool web application context. The issue is classified under CWE-79: Improper Neutralization of Input During Web Page Generation. Exploitation requires user interaction, such as clicking a specially crafted link.

Critical Impact
An authenticated Monitool user who interacts with an attacker-supplied payload can have session data, form input, or displayed telemetry manipulated in their browser, enabling partial session hijack.

Affected Products

Badger Meter Monitool versions 4.6.3 and earlier
Product component: badgermeter:monitool
Deployments in industrial water metering and monitoring environments

Discovery Timeline

2024-03-12 - CVE-2024-1304 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-1304

Vulnerability Analysis

The vulnerability resides in Monitool's handling of user-supplied input rendered back into web pages. The application fails to neutralize special HTML and JavaScript characters before they reach the browser. When an authenticated user loads a page containing attacker-controlled input, the browser executes the embedded script in the trusted origin of the Monitool application.

Because the scope metric changes (S:C), the injected script can affect resources beyond the initial vulnerable component. The confidentiality and integrity impacts are limited, and availability is unaffected. The EPSS probability is approximately 0.67%, placing this CVE in the 49th percentile for likelihood of exploitation activity.

Root Cause

The root cause is improper output encoding of user-controlled parameters that flow into the response HTML. Standard defenses such as context-aware HTML entity encoding, JavaScript string encoding, and a strict Content Security Policy (CSP) are absent or insufficient in the affected versions. This mirrors the classic [CWE-79] pattern seen across web applications that concatenate untrusted input into markup.

Attack Vector

Exploitation requires a network-reachable Monitool instance and an authenticated victim who clicks a malicious link or visits an attacker-influenced page. The attacker embeds a JavaScript payload in a request parameter that Monitool reflects back into the response. The browser executes the payload under Monitool's origin, granting access to session cookies, DOM state, and application forms visible to the victim. Details are documented in the INCIBE Security Notice on Monitool Vulnerabilities.

No public proof-of-concept code has been released for CVE-2024-1304. Refer to the INCIBE advisory for technical context.

Detection Methods for CVE-2024-1304

Indicators of Compromise

HTTP request parameters containing script tags, javascript: URIs, or event handler attributes such as onerror= and onload=
URL-encoded payload fragments like %3Cscript%3E or %3Cimg%20src%3D targeting Monitool endpoints
Unexpected outbound requests from authenticated Monitool sessions to attacker-controlled domains
Referrer chains showing users arriving at Monitool from untrusted external links immediately before anomalous session activity

Detection Strategies

Inspect web server and reverse proxy access logs for reflected XSS patterns in query strings and POST bodies directed at Monitool
Deploy a web application firewall (WAF) rule set that flags common XSS signatures in traffic to the Monitool host
Correlate authenticated Monitool session activity with anomalous DOM-based network calls to external endpoints

Monitoring Recommendations

Enable verbose HTTP request logging on the Monitool web tier and forward logs to a centralized analytics platform
Monitor for unusual session token reuse across distinct client IP addresses or user agents
Alert on Monitool user accounts triggering CSP violation reports if CSP is deployed in report-only mode

How to Mitigate CVE-2024-1304

Immediate Actions Required

Identify all Monitool deployments and confirm the running version against 4.6.3 and earlier
Restrict Monitool web interface access to trusted management networks and VPN users
Instruct Monitool operators to avoid clicking untrusted links while authenticated to the application
Rotate active session cookies and application credentials if suspicious reflected input is observed in logs

Patch Information

Badger Meter has not published a fixed version reference in the NVD entry for CVE-2024-1304 at the time of writing. Operators should contact Badger Meter support directly and review the INCIBE Security Notice on Monitool Vulnerabilities for vendor coordination details and any subsequent updates.

Workarounds

Place Monitool behind a WAF configured to strip or block reflected XSS payloads in request parameters
Enforce a strict Content Security Policy at the reverse proxy layer to block inline script execution
Terminate idle Monitool sessions aggressively to shrink the window available for session hijack
Segment Monitool from general corporate networks and restrict access to operational technology (OT) management stations

bash

# Example NGINX reverse proxy hardening for Monitool
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; frame-ancestors 'none'" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "DENY" always;
add_header Referrer-Policy "no-referrer" always;