High Severity
Affected system
Patch Day
Released on
SAP Note
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A note with CVSS 8.8 for component KM-KW-HTA was released by SAP on 14.12.2021. The correction/advisory 3102769 was described with "[CVE-2021-42063] Cross-Site Scripting (XSS) vulnerability in SAP Knowledge Warehouse" and affects the system type Java.

A workaround exists, according to SAP Security Advisory team. It is advisable to implement the correction as part of maintenance.

The vulnerability addressed is cross-site scripting (xss) information disclosure within Java.

Risk specification

This note has been re-released with updated 'Solution’ information. SAP Knowledge Warehouse does not sufficiently encode user controlled inputs, resulting in Cross-Site Scripting (XSS) vulnerability.


The user input is now properly encoded to prevent a successful XSS attack.  Although an alternative solution exists, it is advisable to apply the correction! This is the workaround, which was suggested by the SAP security experts: "In case that you cannot implement the patch, you have two options for workaround: Option 1: You may disable the vulnerable application following the documentation in "Config Tool Adding Filters - SAP Help Portal" (https://help.sap.com/viewer/0c333adb55cd4dbf8e92a5175703224c/7.5.19/en-US/47b1a4e5ac671599e10000000a42189c.html). 'Component Name Mask' parameter should be set as tc~km_tc*, 'Vendor Mask' Parameter - sap.com . Option 2: In case the requests are routed via SAP Web Dispatcher you may add a rewrite rule to SAP Web Dispatcher to prevent from redirects according to related note 3221696. Add the following rewrite rule to your Web Dispatcher configuration. RegIForbiddenUrl ^/(SAPIrExtHelp|SAPIKS|KW).* - If there is an existing icm/HTTP/mod_<x> = PREFIX=/, FILE=<...> in your setup: Add the new rule (above) to your existing rule file. Restart the Web Dispatcher or reload the file using the Web Administration UI. Otherwise: Create a new file on the file system (for example in the profile directory) and enter the role above in that file. Add a new parameter icm/HTTP/mod_0 = PREFIX=/, FILE=<your created file>. Restart the Web Dispatcher.".

Affected System

SAP Netweaver Application Server Java is part of the SAP NetWeaver Application Platform. It provides the complete infrastructure for deploying and running Java applications.

The advisory is valid for

  • KM-KW_JIKS 7.30
  • KM-KW_JIKS 7.31
  • KM-KW_JIKS 7.40
  • KM-KW_JIKS 7.50




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