# CVE-2020-6187: XML external entity in SAP NetWeaver (Guided Procedures)

> An attacker with admin access can cause a Denial of Service in SAP NetWeaver Guided Procedures via insufficient XML validation.

- **Severity:** Medium 4.9 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Feb 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-x3g8-jv8c-3mvc

## What is CVE-2020-6187?

CVE-2020-6187 is a medium-severity vulnerability in SAP NetWeaver (Guided Procedures), published on 12 Feb 2020. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

SAP NetWeaver (Guided Procedures), versions 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, does not sufficiently validate an XML document input from a compromised admin, leading to Denial of Service.

Weakness: CWE-611 (Improper Restriction of XML External Entity Reference)

## Which versions are affected by CVE-2020-6187?

It affects 1 product.


Products: Sap Netweaver Guided Procedures.

## How do I fix CVE-2020-6187?

No fix has been published for CVE-2020-6187 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-6187 being exploited?

There is no known exploitation of CVE-2020-6187 in the wild and no public exploit code.

## Other vulnerabilities in SAP NetWeaver (Guided Procedures)

- [CVE-2021-33671](https://insights.sbomify.com/CVE-2021-33671/): Missing authorization in SAP NetWeaver Guided Procedures (Administration Workset) (high 7.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-6187 and fix it if it is affected.

What it is: CVE-2020-6187 is a medium-severity vulnerability in SAP NetWeaver (Guided Procedures), published on 12 Feb 2020. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-6187 in the wild and no public exploit code.

Affected product: SAP NetWeaver (Guided Procedures). 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-2020-6187/ (Markdown: https://insights.sbomify.com/CVE-2020-6187/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-6187
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-6187
- OSV: https://osv.dev/vulnerability/CVE-2020-6187

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-6187/
Summaries are generated and may contain mistakes; the official description above is the record.