SAP CRM WebClient UI Cross-Site Scripting via Missing CSP

Executive Summary

CVE-2026-44768 is a vulnerability in SAP CRM WebClient UI where an attacker can inject and execute malicious scripts within the application. This occurs because the application lacks a properly configured Content Security Policy (CSP) for certain restrictive directives. The vulnerability specifically allows script injection, which could lead to unintended actions being performed in the context of the application.

The impact of this vulnerability is primarily on the integrity of the application, meaning an attacker could manipulate data or functionality presented to users. However, confidentiality and availability are not affected based on the provided information.

• Vulnerability type: Cross-Site Scripting (XSS) due to missing CSP directives.
• CVSS v3.1 Base Score: 4.1 (Medium), with the vector AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N.

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Detection Guidance

Detecting this vulnerability involves checking if the SAP CRM WebClient UI lacks a properly configured Content Security Policy (CSP) for restrictive directives. Since this is a client-side vulnerability, detection primarily relies on inspecting the application's HTTP response headers or analyzing the application's behavior.

• Check HTTP response headers for CSP: Use browser developer tools (e.g., Chrome DevTools, Firefox Developer Tools) or command-line tools like curl to inspect the HTTP headers of the SAP CRM WebClient UI. Look for the 'Content-Security-Policy' header. If it is missing or lacks restrictive directives (e.g., 'script-src', 'default-src'), the vulnerability may be present.
• Example curl command to check headers: curl -I https://your-sap-crm-webclient-url.com
• Use security scanning tools: Tools like OWASP ZAP, Burp Suite, or Nessus may include checks for missing or misconfigured CSP headers. Run a scan against the SAP CRM WebClient UI to identify potential vulnerabilities.
• Review SAP Security Notes: Refer to SAP Security Note 3155685 (Resource 1) for specific detection guidance or patches related to this vulnerability.

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Impact Analysis

If you are using SAP CRM WebClient UI, this vulnerability could allow an attacker to execute malicious scripts in your browser while interacting with the application. The impact includes:

• Manipulation of application data or functionality: An attacker could alter how the application behaves or displays information, potentially tricking users into performing unintended actions.
• Session hijacking: If the injected script steals session cookies or tokens, an attacker could impersonate legitimate users.
• Phishing attacks: Malicious scripts could redirect users to fake login pages or prompt them to disclose sensitive information.

The vulnerability requires low privileges (PR:L) and user interaction (UI:R), meaning an attacker would need to trick a logged-in user into visiting a crafted link or page. However, the impact is limited to the integrity of the application, as confidentiality and availability are not affected.

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Compliance Impact

This vulnerability could have implications for compliance with several standards and regulations, depending on the context of your organization:

• GDPR (General Data Protection Regulation): If the SAP CRM WebClient UI processes personal data of EU citizens, this vulnerability could lead to unauthorized access or manipulation of that data. GDPR requires organizations to implement appropriate technical measures to protect personal data, and a failure to address this vulnerability could be seen as a lapse in security controls, potentially resulting in non-compliance.
• HIPAA (Health Insurance Portability and Accountability Act): If the application handles protected health information (PHI), this vulnerability could expose PHI to unauthorized manipulation. HIPAA mandates safeguards to ensure the integrity and security of PHI, and this vulnerability could violate those requirements.
• ISO 27001: This standard requires organizations to implement controls to manage information security risks. A missing CSP configuration could be considered a failure to implement adequate security controls, potentially leading to non-compliance with ISO 27001 requirements.
• PCI DSS (Payment Card Industry Data Security Standard): If the application processes payment card data, this vulnerability could compromise the integrity of transactions or user interactions, which may violate PCI DSS requirements for secure application development and maintenance.

While the vulnerability does not directly expose confidential data, its potential to manipulate application behavior could lead to indirect violations of these regulations, particularly if the application handles sensitive or regulated data.

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Mitigation Strategies

To mitigate this vulnerability, follow these immediate steps:

• Apply the latest SAP security patches: Check SAP Security Note 3155685 (Resource 1) for the official patch or workaround provided by SAP. Apply the patch as soon as possible to address the missing CSP configuration.
• Manually configure a Content Security Policy (CSP): If a patch is not immediately available, manually add a CSP header to the SAP CRM WebClient UI. Ensure the CSP includes restrictive directives such as 'script-src', 'default-src', and 'object-src' to prevent script injection attacks. Example CSP header: Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; object-src 'none';
• Restrict user access: Limit access to the SAP CRM WebClient UI to trusted users only. Ensure that low-privileged users cannot exploit the vulnerability by enforcing strict access controls.
• Monitor for suspicious activity: Implement logging and monitoring to detect any attempts to exploit the vulnerability. Review logs for unusual script execution or unauthorized access attempts.
• Refer to SAP Security Patch Day resources: Review the latest SAP Security Notes and advisories (Resource 2) for additional guidance on securing your SAP environment.

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