# CVE-2020-5847: Unraid Remote Code Execution Vulnerability

Source: https://junglewise.ai/threats/cve-2020-5847-unraid-remote-code-execution-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2020-5847 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03

Unraid versions through 6.8.0 contain a remote code execution vulnerability due to the insecure use of the extract() PHP function. An unauthenticated attacker can exploit this to execute code as root, often by chaining it with CVE-2020-5849 for initial access.

Technologies: [Unraid](https://junglewise.ai/threats/technologies/unraid). Vendors: [Unraid](https://junglewise.ai/threats/vendors/unraid).

## Quick answers

**Is CVE-2020-5847 exploited in the wild?** Yes. CVE-2020-5847 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

**How severe is CVE-2020-5847?** Critical severity, with a CVSS score of 9.8, published 3 November 2021.

**Which products and versions are affected?** Unraid Unraid up to and including 6.8.0.

**Is there a fix for CVE-2020-5847?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2020-5847 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2020-5847?** Check whether you run Unraid. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Unraid Unraid up to and including 6.8.0

## Timeline

- 2020-02-06: disclosed: Initial disclosure by Sysdream
- 2020-03-16: advisory: NVD Published Date
- 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2021-11-03: exploited: Reported as exploited in the wild per CISA KEV catalog entry date

## Related threats

- [Unraid Authentication Bypass Vulnerability](https://junglewise.ai/threats/cve-2020-5849-unraid-authentication-bypass-vulnerability)