Unraid 6.8.0 allows authentication bypass.

published 2020-03-16 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-27003

cvss: 7.5; version 3.1, CNA
cisa kev: Exploited; added 2021-11-03
epss: 93.2%; EPSS 93.2% chance of exploitation in 30 days, percentile 99.8%
public exploits: 2; Metasploit, Exploit-DB

Patch / fix

cisa required action Apply updates per vendor instructions.

Timeline

2020-02-10 First public exploit (Metasploit exploit/linux/http/unraid_auth_bypass_exec)
2020-03-16 Published
2021-11-03 Added to CISA KEV
2022-05-03 CISA patch deadline
2025-02-04 CISA SSVC: exploitation active

Known exploited

Added: 5 y ago (2021-11-03)
Patch by: 2022-05-03 (4 y ago)
Ransomware: Not known
Required action: Apply updates per vendor instructions.
Vendor, product: Unraid, Unraid
CISA name: Unraid Authentication Bypass Vulnerability

CISA SSVC

Exploitation: Active, exploited in the wild
Automatable: yes
Technical impact: partial
Assessed: 21 mo ago (2025-02-04)

Exploit prediction

93.24% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Metasploit exploit/linux/http/unraid_auth_bypass_exec Unraid 6.8.0 Auth Bypass PHP Code Execution metasploit exploit, excellent rank, 2020-02-10
EDB-48353 Unraid 6.8.0 - Auth Bypass PHP Code Execution (Metasploit) remote, 2020-04-20
sysdream.com https://sysdream.com/news/lab/2020-02-06-cve-2020-5847-cve-2020-5849-unraid-6-8-0-unauthenticated-remote-code-execution-as-root/ referenced PoC, tagged "exploit" by a source, unverified
packetstormsecurity.com http://packetstormsecurity.com/files/157275/Unraid-6.8.0-Authentication-Bypass-Arbitrary-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness

CWE-697 Incorrect Comparison

References

sysdream.com /news/lab/2020-02-06-cve-2020-5847-cve-2020-5849-unraid-6-8-0-unauthenticated-remote-code-execution-as-root/
broken-link, exploit, third-party-advisory
packetstormsecurity.com /files/157275/Unraid-6.8.0-Authentication-Bypass-Arbitrary-Code-Execution.html
exploit, third-party-advisory, vdb-entry
forums.unraid.net /forum/7-announcements/
release-notes, vendor-advisory
sysdream.com /news/lab/
third-party-advisory
cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-5849
government-resource, us-government-resource

Sources

CVE List CVE-2020-5849
NVD CVE-2020-5849

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary