# CVE-2021-20527: Command injection in Resilient OnPrem

> Privileged users can inject malicious scripts executed as another user, enabling code execution and privilege escalation in IBM Resilient SOAR.

- **Severity:** Medium 6.0 (`CVSS:3.0/S:U/I:H/C:L/PR:H/A:L/AC:L/UI:N/AV:N/RL:O/E:U/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Apr 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-fc44-mm95-mf77

## What is CVE-2021-20527?

CVE-2021-20527 is a medium-severity command injection vulnerability in IBM Resilient OnPrem, published on 19 Apr 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

IBM Resilient SOAR V38.0 could allow a privileged user to create create malicious scripts that could be executed as another user. IBM X-Force ID: 198759.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2021-20527?

It affects 1 product.


Products: Ibm Resilient.

## How do I fix CVE-2021-20527?

No fix has been published for CVE-2021-20527 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-20527 being exploited?

There is no known exploitation of CVE-2021-20527 in the wild and no public exploit code.

## Other vulnerabilities in IBM Resilient OnPrem

- [CVE-2016-6062](https://insights.sbomify.com/CVE-2016-6062/): Cross-site scripting in Resilient (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-20527 and fix it if it is affected.

What it is: CVE-2021-20527 is a medium-severity command injection vulnerability in IBM Resilient OnPrem, published on 19 Apr 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-20527 in the wild and no public exploit code.

Affected product: IBM Resilient OnPrem. 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-2021-20527/ (Markdown: https://insights.sbomify.com/CVE-2021-20527/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-20527
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-20527
- OSV: https://osv.dev/vulnerability/CVE-2021-20527

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-20527/
Summaries are generated and may contain mistakes; the official description above is the record.