CVE-2019-25324: RICOH Web Image Monitor XSS Vulnerability

CVE-2019-25324 Overview

CVE-2019-25324 is an HTML injection vulnerability affecting RICOH Web Image Monitor version 1.09. The vulnerability exists in the address configuration CGI script, which fails to properly sanitize user input in the entryNameIn and entryDisplayNameIn parameters. This improper input validation allows attackers to inject malicious HTML code, potentially enabling cross-site scripting (XSS) attacks against users accessing the affected web interface.

Critical Impact

Attackers can inject arbitrary HTML content through the address configuration CGI script, potentially leading to cross-site scripting attacks that could compromise user sessions, steal credentials, or deliver malicious payloads to administrators managing RICOH devices.

Affected Products

• RICOH Web Image Monitor 1.09
• RICOH devices utilizing Web Image Monitor for remote management
• Network-connected RICOH multifunction printers with vulnerable firmware

Discovery Timeline

• 2026-02-12 - CVE CVE-2019-25324 published to NVD
• 2026-02-12 - Last updated in NVD database

Technical Details for CVE-2019-25324

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting (XSS). The flaw resides in the address configuration CGI script within RICOH Web Image Monitor, a web-based management interface used to configure and monitor RICOH multifunction devices.

The affected component fails to implement adequate input sanitization for the entryNameIn and entryDisplayNameIn parameters. When administrators or authorized users interact with the address book configuration functionality, these parameters accept user-supplied data that is subsequently rendered in the web interface without proper HTML encoding or filtering.

The network attack vector requires user interaction, meaning an attacker must craft a malicious link or page that, when accessed by an authenticated user, executes the injected HTML/JavaScript code within the context of the trusted Web Image Monitor session.

Root Cause

The root cause of CVE-2019-25324 is insufficient input validation and output encoding in the address configuration CGI script. The application accepts user-supplied input for the entryNameIn and entryDisplayNameIn parameters and reflects this content back to the browser without properly sanitizing or escaping special HTML characters. This allows HTML tags and JavaScript code to be interpreted by the browser rather than being displayed as plain text.

Attack Vector

The attack is conducted over the network and requires an attacker to craft a malicious request containing HTML or JavaScript payloads in the vulnerable parameters. The attacker must then convince a victim with access to the Web Image Monitor interface to interact with the malicious request, typically through social engineering tactics such as phishing emails or malicious links.

The injected content executes within the victim's browser session, potentially allowing the attacker to steal session cookies, redirect users to malicious sites, modify page content to display fraudulent information, or perform actions on behalf of the authenticated user.

For technical details and proof-of-concept information, refer to the Exploit-DB #47827 entry and the VulnCheck Advisory on Ricoh.

Detection Methods for CVE-2019-25324

Indicators of Compromise

• Unusual HTML tags or JavaScript code appearing in Web Image Monitor address book entries
• Access logs showing requests to CGI endpoints with encoded HTML entities in entryNameIn or entryDisplayNameIn parameters
• Reports from users experiencing unexpected browser behavior or redirects when accessing the Web Image Monitor interface
• Presence of script tags, event handlers, or iframe elements in form submission data

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block requests containing HTML tags in the entryNameIn and entryDisplayNameIn parameters
• Monitor HTTP request logs for patterns indicating XSS payloads such as <script>, javascript:, onerror=, or similar constructs
• Deploy intrusion detection signatures targeting HTML injection attempts against RICOH Web Image Monitor endpoints
• Conduct periodic security assessments of Web Image Monitor configurations and access logs

Monitoring Recommendations

• Enable detailed logging for all CGI script requests on RICOH devices with Web Image Monitor
• Configure SIEM alerts for suspicious parameter values in requests to the address configuration endpoints
• Regularly audit address book entries for unexpected or malicious content
• Monitor network traffic for unusual patterns of access to the Web Image Monitor interface

How to Mitigate CVE-2019-25324

Immediate Actions Required

• Restrict network access to the Web Image Monitor interface to trusted IP ranges and administrative networks only
• Implement Content Security Policy (CSP) headers at the network level to mitigate XSS impact
• Educate administrators to avoid clicking on suspicious links while authenticated to device management interfaces
• Consider disabling Web Image Monitor if not required for operations until a patch is available

Patch Information

Consult the Ricoh Official Website for the latest firmware updates addressing this vulnerability. Review the Support Download Documentation for device-specific update procedures and availability. Organizations should contact their RICOH support representative to confirm patch availability for their specific device models.

Workarounds

• Place Web Image Monitor behind a reverse proxy that performs input validation and strips potentially malicious content
• Implement network segmentation to isolate RICOH devices from general user networks
• Use browser extensions that block inline scripts for administrators accessing the management interface
• Disable address book functionality if not operationally required

# Example: Restrict access to Web Image Monitor using firewall rules
# Limit access to management interface to specific admin subnet
iptables -A INPUT -p tcp --dport 80 -s 192.168.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 192.168.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP