# CVE-2021-42063: SAP Knowledge Warehouse - XSS

> Live exploitation tracking for CVE-2021-42063 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2021-42063

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 6.1
- **Public exploit available:** Yes
- **Affected products:** SAP Knowledge Warehouse
- **Weaknesses:** CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))
- **Tags:** enterprise_software

## Description

A security vulnerability has been discovered in the SAP Knowledge Warehouse - versions 7.30, 7.31, 7.40, 7.50. The usage of one SAP KW component within a Web browser enables unauthorized attackers to conduct XSS attacks, which might lead to disclose sensitive data.

## CrowdSec analysis

[CVE-2021-42063](https://euvd.enisa.europa.eu/vulnerability/CVE-2021-42063) is a vulnerability in SAP Knowledge Warehouse that can be exploited for cross-site scripting (XSS), potentially leading to disclosure of sensitive data through manipulated browser interactions.

CrowdSec has been tracking this vulnerability and its exploits since 22nd of May 2025.

CrowdSec network observations suggest that most exploitation of CVE-2021-42063 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental.
Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2021-42063 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2021-42063 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Observed exploitation attempts typically involve URLs containing `/sapirexthelp/random/sapirexthelp/random/`.

## Timeline

- 2021-12-14: CVE Published. CVE-2021-42063 is published to NVD.
- 2025-05-22: Rule Released. CrowdSec releases a rule to detect CVE-2021-42063 exploitation attempts against the CrowdSec Network.
- 2025-05-23: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2021-42063 for the first time.

## References

- https://launchpad.support.sap.com/#/notes/3102769
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-42063.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2021-42063) follows observed exploitation activity for CVE-2021-42063. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.