CVE-2024-41785: IBM Concert Software XSS Vulnerability

CVE-2024-41785 Overview

IBM Concert Software versions 1.0.0 through 1.0.1 contain a cross-site scripting (XSS) vulnerability [CWE-79] in the Web UI. An unauthenticated attacker can embed arbitrary JavaScript code that executes within a trusted session. Successful exploitation alters the intended functionality of the application and can lead to credentials disclosure.

The flaw requires user interaction, such as clicking a crafted link, and operates over the network attack vector. Because the injected script runs in the context of the victim's authenticated session, attackers can harvest session tokens, manipulate rendered content, or redirect users to attacker-controlled resources.

Critical Impact
Unauthenticated attackers can execute arbitrary JavaScript in a victim's browser session, enabling credential theft and session manipulation within IBM Concert.

Affected Products

IBM Concert Software 1.0.0
IBM Concert Software 1.0.1
Deployments exposing the Concert Web UI to untrusted users

Discovery Timeline

2024-11-15 - CVE-2024-41785 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-41785

Vulnerability Analysis

The vulnerability is a reflected or stored cross-site scripting flaw in the IBM Concert Web UI. The application fails to properly neutralize user-controlled input before rendering it in generated web pages. Attackers craft payloads containing JavaScript that the browser interprets as legitimate application content.

Because the attack scope changes, injected scripts can access resources beyond the vulnerable component. This includes session cookies, tokens, and Document Object Model (DOM) elements rendered by trusted application pages. The attack requires an unauthenticated adversary to lure a victim into interacting with a malicious URL or UI element.

Root Cause

The root cause is improper neutralization of input during web page generation, categorized under CWE-79. IBM Concert does not consistently apply contextual output encoding or input sanitization on data rendered in the Web UI. Any user-supplied field reflected into HTML, JavaScript, or attribute contexts becomes an injection point.

Attack Vector

An attacker crafts a URL or input containing a JavaScript payload and delivers it to an authenticated Concert user through phishing, social engineering, or a malicious link. When the victim interacts with the payload, the Concert Web UI reflects the content into the response without adequate encoding. The browser then executes the attacker's script within the trusted origin of the Concert application, exposing credentials and session data.

No verified public proof-of-concept exploit is available at the time of writing. See the IBM Support advisory for vendor-provided technical details.

Detection Methods for CVE-2024-41785

Indicators of Compromise

Web server access logs containing URL parameters with <script>, javascript:, onerror=, or encoded variants targeting Concert endpoints
Unusual outbound requests from user browsers to unknown domains immediately after a Concert session begins
Unexpected session token reuse from geographically distinct source addresses following a user click on an external link

Detection Strategies

Deploy a web application firewall (WAF) with signatures that flag XSS payload patterns targeting the Concert Web UI
Enable detailed HTTP request logging on the Concert front-end proxy and alert on request parameters containing HTML or script delimiters
Correlate browser-side Content Security Policy (CSP) violation reports with user activity in Concert to identify injection attempts

Monitoring Recommendations

Monitor authentication logs for session anomalies such as concurrent logins or token theft indicators
Track user-reported UI anomalies, unexpected redirects, or credential prompts rendered within Concert
Review Concert audit logs for administrative actions originating from unexpected sessions

How to Mitigate CVE-2024-41785

Immediate Actions Required

Apply the IBM-provided fix referenced in the IBM Support advisory for CVE-2024-41785
Inventory all IBM Concert deployments running versions 1.0.0 and 1.0.1 and prioritize them for remediation
Restrict Web UI access to trusted networks until the patch is deployed
Educate users to avoid clicking untrusted links that reference the Concert application

Patch Information

IBM has published a security bulletin and patch guidance for CVE-2024-41785. Review the IBM Support page for the fixed release version and upgrade instructions specific to your Concert deployment.

Workarounds

Enforce a strict Content Security Policy (CSP) on the Concert Web UI to block inline script execution and restrict script sources
Configure the reverse proxy fronting Concert to inspect and reject requests containing script delimiters or known XSS payload patterns
Set session cookies with HttpOnly and Secure attributes to limit JavaScript access to authentication tokens
Enable multi-factor authentication (MFA) for Concert users to reduce the impact of credential disclosure

bash

# Example CSP header enforced at the reverse proxy for the Concert Web UI
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; frame-ancestors 'none'; base-uri 'self';" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "DENY" always;