CVE-2020-5849

HIGH KEV

unraid 6.8.0 - Authentication Bypass

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2020-5849 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added November 3, 2021. EIP tracks 2 public exploits from researchers including Metasploit, Nicolas CHATELAIN <[email protected]>, including a Metasploit module exploits/linux/http/unraid_auth_bypass_exec.

AI-analyzed exploit summary This Metasploit module exploits CVE-2020-5849, an authentication bypass in Unraid 6.8.0, followed by arbitrary PHP code execution via insecure use of the `extract` function. It leverages a GET request with crafted parameters to achieve remote code execution as root.

Description

Unraid 6.8.0 allows authentication bypass.

Exploits (2)

exploitdb WORKING POC VERIFIED
by Metasploit · rubyremotelinux
https://www.exploit-db.com/exploits/48353

This Metasploit module exploits CVE-2020-5849, an authentication bypass in Unraid 6.8.0, followed by arbitrary PHP code execution via insecure use of the `extract` function. It leverages a GET request with crafted parameters to achieve remote code execution as root.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Unraid 6.8.0
No auth needed
Prerequisites: Network access to the Unraid web interface · Unraid version 6.8.0
devstral-2 · analyzed Feb 16, 2026 Full analysis →
metasploit WORKING POC EXCELLENT
by Nicolas CHATELAIN <[email protected]> · rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/unraid_auth_bypass_exec.rb

This Metasploit module exploits CVE-2020-5849, an authentication bypass in Unraid 6.8.0, combined with an insecure PHP `extract` function usage to achieve remote code execution as root. It sends a crafted GET request to inject PHP code via URI-encoded payloads.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Unraid 6.8.0
No auth needed
Prerequisites: Network access to the Unraid web interface · Unraid version 6.8.0
devstral-2 · analyzed Apr 23, 2026 Full analysis →

References (5)

Core 5

Scores

CVSS v3 7.5
EPSS 0.9376
EPSS Percentile 99.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation active
Automatable yes
Technical Impact partial

Details

CISA KEV 2021-11-03
VulnCheck KEV 2021-11-03
InTheWild.io 2021-07-23
ENISA EUVD EUVD-2020-27003
CWE
CWE-697
Status published
Products (1)
unraid/unraid 6.8.0 (2 CPE variants)
Published Mar 16, 2020
KEV Added Nov 03, 2021
Tracked Since Feb 18, 2026