# CVE-2021-42063: Cross-site scripting in SAP Knowledge Warehouse

> Unauthorized attackers can execute cross-site scripting attacks in SAP Knowledge Warehouse via web browser, potentially disclosing sensitive data.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 14 Dec 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-rw6f-wgvq-rrvg

## What is CVE-2021-42063?

CVE-2021-42063 is a medium-severity cross-site scripting vulnerability in SAP Knowledge Warehouse, published on 14 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-42063?

It affects 1 product.


Products: Sap Knowledge Warehouse.

## How do I fix CVE-2021-42063?

No fix has been published for CVE-2021-42063 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-42063 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-42063 exists.

Public exploit code:

- SAP Knowledge Warehouse <=7.5.0 - Cross-Site Scripting (github_poc): https://github.com/Cappricio-Securities/CVE-2021-42063
- SAP Knowledge Warehouse <=7.5.0 - Cross-Site Scripting (nuclei): http/cves/2021/CVE-2021-42063.yaml

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-42063 and fix it if it is affected.

What it is: CVE-2021-42063 is a medium-severity cross-site scripting vulnerability in SAP Knowledge Warehouse, published on 14 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-42063 exists.

Affected product: SAP Knowledge Warehouse. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-42063/ (Markdown: https://insights.sbomify.com/CVE-2021-42063/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-42063
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-42063
- OSV: https://osv.dev/vulnerability/CVE-2021-42063

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-42063/
Summaries are generated and may contain mistakes; the official description above is the record.