Reflected Cross-Site Scripting (XSS) in SAP NetWeaver
Impact on Business
Successful exploitation of this vulnerability allows an unauthenticated remote attacker to inject malicious JavaScript code into the application. This code is executed within the victim’s browser session when they interact with a crafted URL. This can lead to session hijacking, redirection to malicious websites, defacement of the trusted application, or the theft of sensitive information such as user credentials.
Vulnerability Details
A Reflected Cross-Site Scripting (XSS) vulnerability exists in the SAP Basis component. The vulnerability is located within the CL_HTTP_EXT_ITS handler associated with the Internet Transaction Server (ITS). Due to insufficient neutralization of input during web page generation, an attacker can craft a malicious link that, when clicked by a victim, executes arbitrary JavaScript in the context of the vulnerable application.
Solution
SAP has released SAP Note 3617131 which provides patched versions of the affected components.
The patches can be downloaded from https://me.sap.com/notes/3617131.
Onapsis strongly recommends SAP customers to download the related security fixes and apply them to the affected components in order to reduce business risks.
Report Timeline
- 05/28/2025: Onapsis reports vulnerability to SAP
- 07/08/2025: SAP issues the patch
References
Advisory Information
- Public Release Date: 07/30/2026
- Security Advisory ID: ONAPSIS-2026-0022
- Researcher(s): Adrian Radulescu
Vulnerability Information
- Vendor: SAP
- Affected Components: SAP NetWeaver AS ABAP (SAP_BASIS) (Check SAP Note 3617131 for detailed information on affected releases)
- Vulnerability Class: Cross-Site Scripting
- CVSS v3 score: 6.1 (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
- Risk Level: Medium
- Assigned CVE: CVE-2025-42981
- Vendor patch Information: SAP Security NOTE 3617131
Affected Components Description
The vulnerability affects the SAP Basis Component (SAP_BASIS). Specific versions and support package levels affected include, but may not be limited to, SAP_BASIS release 758. Customers are advised to verify the full list of affected versions in the associated SAP Security Note.
About our Research Labs
Onapsis Research Labs provides the industry analysis of key security issues that impact mission-critical systems and applications. Delivering frequent and timely security and compliance advisories with associated risk levels, Onapsis Research Labs combine in-depth knowledge and experience to deliver technical and business-context with sound security judgment to the broader information security community.
Find all reported vulnerabilities at: https://github.com/Onapsis/vulnerability_advisories
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