# CVE-2021-21477: Code injection in SAP Commerce

> Authenticated attackers with specific privileges can inject malicious code into Drools rules, leading to remote code execution and host compromise.

- **Severity:** Critical 9.9 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **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:** 9 Feb 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-jg2g-jq85-v7jw

## What is CVE-2021-21477?

CVE-2021-21477 is a critical code injection vulnerability in SAP Commerce, published on 9 Feb 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

SAP Commerce Cloud, versions - 1808,1811,1905,2005,2011, enables certain users with required privileges to edit drools rules, an authenticated attacker with this privilege will be able to inject malicious code in the drools rules which when executed leads to Remote Code Execution vulnerability enabling the attacker to compromise the underlying host enabling him to impair confidentiality, integrity and availability of the application.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2021-21477?

It affects 1 product.


Products: Sap Commerce.

## How do I fix CVE-2021-21477?

No fix has been published for CVE-2021-21477 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-21477 being exploited?

There is no known exploitation of CVE-2021-21477 in the wild and no public exploit code.

## Other vulnerabilities in SAP Commerce

- [CVE-2021-27602](https://insights.sbomify.com/CVE-2021-27602/): Code injection in SAP Commerce (critical 9.9)
- [CVE-2021-42064](https://insights.sbomify.com/CVE-2021-42064/): SQL injection in SAP Commerce (critical 9.8)
- [CVE-2020-6265](https://insights.sbomify.com/CVE-2020-6265/): Hardcoded credentials in SAP Commerce (critical 9.8)
- [CVE-2022-41204](https://insights.sbomify.com/CVE-2022-41204/): Open redirect in SAP Commerce (high 8.8)
- [CVE-2021-40502](https://insights.sbomify.com/CVE-2021-40502/): Missing authorization in SAP Commerce (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-21477 and fix it if it is affected.

What it is: CVE-2021-21477 is a critical code injection vulnerability in SAP Commerce, published on 9 Feb 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-2021-21477 in the wild and no public exploit code.

Affected product: SAP Commerce. 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-2021-21477/ (Markdown: https://insights.sbomify.com/CVE-2021-21477/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-21477
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-21477
- OSV: https://osv.dev/vulnerability/CVE-2021-21477

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-21477/
Summaries are generated and may contain mistakes; the official description above is the record.