# CVE-2021-27604: XML external entity in SAP Process Integration (Enterprise Service Repository JAVA Mappings)

> An XML External Entity vulnerability in SAP NetWeaver ABAP allows attackers to read sensitive data or cause denial of service.

- **Severity:** High 7.7 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-98g3-884p-c9q5

## What is CVE-2021-27604?

CVE-2021-27604 is a high-severity vulnerability in SAP Process Integration (Enterprise Service Repository JAVA Mappings), published on 14 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In order to prevent XML External Entity vulnerability in SAP NetWeaver ABAP Server and ABAP Platform (Process Integration - Enterprise Service Repository JAVA Mappings), versions - 7.10, 7.20, 7.30, 7.31, 7.40, 7.50, SAP recommends to refer this note.

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

## Which versions are affected by CVE-2021-27604?

It affects 1 product.


Products: Sap Netweaver Process Integration.

## How do I fix CVE-2021-27604?

No fix has been published for CVE-2021-27604 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27604 being exploited?

There is no known exploitation of CVE-2021-27604 in the wild and no public exploit code.

## Other vulnerabilities in SAP Process Integration (Enterprise Service Repository JAVA Mappings)

- [CVE-2022-41272](https://insights.sbomify.com/CVE-2022-41272/): Missing authorization in NetWeaver Process Integration (critical 9.9)
- [CVE-2022-41271](https://insights.sbomify.com/CVE-2022-41271/): SQL injection in NetWeaver Process Integration (critical 9.4)
- [CVE-2019-0315](https://insights.sbomify.com/CVE-2019-0315/): Information disclosure in SAP NetWeaver Process Integration(SAP XIESR) (high 7.5)
- [CVE-2019-0328](https://insights.sbomify.com/CVE-2019-0328/): Command injection in SAP NetWeaver Process Integration ABAP tests (SAP Basis) (high 7.2)
- [CVE-2019-0283](https://insights.sbomify.com/CVE-2019-0283/): Security feature bypass in SAP NetWeaver Process Integration (Adapter Engine) (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27604 and fix it if it is affected.

What it is: CVE-2021-27604 is a high-severity vulnerability in SAP Process Integration (Enterprise Service Repository JAVA Mappings), published on 14 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-27604 in the wild and no public exploit code.

Affected product: SAP Process Integration (Enterprise Service Repository JAVA Mappings). 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-2021-27604/ (Markdown: https://insights.sbomify.com/CVE-2021-27604/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27604
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27604
- OSV: https://osv.dev/vulnerability/CVE-2021-27604

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-27604/
Summaries are generated and may contain mistakes; the official description above is the record.