CVE-2024-37177: SAP Financial Consolidation XSS Flaw

CVE-2024-37177 Overview

CVE-2024-37177 is a cross-site scripting (XSS) vulnerability [CWE-79] in SAP Financial Consolidation. The application accepts data from an untrusted source and renders it within web pages without sufficient sanitization. Network-exposed endpoints allow an attacker to modify web content delivered to other users. Successful exploitation impacts the confidentiality and integrity of the application, though user interaction is required to trigger the malicious payload.

SAP disclosed the issue through SAP Security Patch Day in June 2024 and tracks the fix under SAP Note #3457592.

Critical Impact
An unauthenticated attacker can inject script content that executes in the browser of a victim user, enabling session theft, data tampering, and unauthorized actions within SAP Financial Consolidation.

Affected Products

SAP Financial Consolidation (web application interface)
Refer to SAP Note #3457592 for the complete list of affected component versions
Deployments exposing SAP Financial Consolidation endpoints over the network

Discovery Timeline

2024-06-11 - CVE-2024-37177 published to the National Vulnerability Database
2026-04-15 - Last updated in NVD database

Technical Details for CVE-2024-37177

Vulnerability Analysis

The vulnerability stems from improper neutralization of input during web page generation. SAP Financial Consolidation exposes web endpoints that accept attacker-controlled data and reflect or store that data in responses served to other users. Because the application does not enforce output encoding or context-aware sanitization, an attacker can embed script content that the browser interprets as executable code.

The attack requires user interaction, typically by inducing an authenticated user to visit a crafted URL or load a page containing the injected payload. Once the script executes in the victim's browser, it runs under the origin of the SAP Financial Consolidation application. The attacker inherits the victim's session context and can read sensitive financial data, modify displayed content, or invoke privileged application functions on behalf of the user.

The vulnerability does not directly impact availability but enables high-impact confidentiality and integrity violations within a financial reporting platform.

Root Cause

The root cause is missing input validation and output encoding on web-facing endpoints. The application trusts data received from network requests and incorporates it into rendered HTML without escaping characters such as <, >, and ". This allows HTML and JavaScript injection into the response stream.

Attack Vector

An attacker delivers a crafted link or hosts a malicious page that submits data to the vulnerable SAP Financial Consolidation endpoint. When an authenticated user interacts with the payload, the injected script executes in their browser context. The attacker can then exfiltrate session tokens, capture form data such as financial consolidation entries, or perform state-changing operations using the victim's privileges. Exploitation requires no authentication on the attacker side but does require the victim to be logged in and to trigger the payload.

No public proof-of-concept code has been verified for this issue. See SAP Note #3457592 for vendor technical details.

Detection Methods for CVE-2024-37177

Indicators of Compromise

HTTP requests to SAP Financial Consolidation endpoints containing <script>, javascript:, onerror=, or encoded variants such as %3Cscript%3E in query parameters or POST bodies
Unexpected outbound connections from user workstations to attacker-controlled domains shortly after accessing SAP Financial Consolidation
Browser console errors or anomalous DOM modifications reported by users on consolidation pages

Detection Strategies

Inspect web server and reverse-proxy logs for parameter values containing HTML or JavaScript syntax targeting SAP Financial Consolidation URLs
Deploy web application firewall (WAF) rules that flag reflected payload patterns and known XSS signatures
Correlate authenticated user sessions with anomalous client-side behavior such as unexpected token exfiltration to external hosts

Monitoring Recommendations

Enable verbose HTTP request logging on the SAP Financial Consolidation tier and forward logs to a centralized analytics platform
Monitor for repeated requests from the same source to consolidation endpoints carrying suspicious encoded characters
Track outbound traffic from administrative and finance user workstations for connections to newly registered or low-reputation domains

How to Mitigate CVE-2024-37177

Immediate Actions Required

Apply the fix described in SAP Note #3457592 to all SAP Financial Consolidation instances
Inventory exposed SAP Financial Consolidation endpoints and restrict them to trusted network segments where possible
Instruct users to avoid clicking SAP Financial Consolidation links from untrusted sources until patches are confirmed deployed

Patch Information

SAP released the patch through SAP Security Patch Day. Customers should authenticate to the SAP Support Portal and follow the implementation steps in SAP Note #3457592. Review the broader SAP Security Notes Overview to ensure dependent components are also up to date.

Workarounds

Place SAP Financial Consolidation behind a WAF configured to block reflected and stored XSS payloads
Enforce a strict Content Security Policy (CSP) on the application origin to limit inline script execution
Set HttpOnly and Secure flags on session cookies to reduce the impact of script-based session theft
Restrict network access to the application using VPN or IP allowlisting until patching is complete

bash

# Example WAF rule pattern (ModSecurity) to flag XSS-like payloads on SAP FC endpoints
SecRule REQUEST_URI "@beginsWith /sap/financial-consolidation" \
    "chain,phase:2,deny,status:403,id:1003717,msg:'Potential XSS targeting SAP Financial Consolidation'"
    SecRule ARGS|REQUEST_HEADERS "@rx (?i)(<script|javascript:|onerror=|onload=|%3Cscript)" \
        "t:none,t:urlDecodeUni"