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Fencer Intel
high 7.5

CVE-2020-5849 kev in the critical feed json

Unraid 6.8.0 allows authentication bypass.

published 6y ago modified 4mo 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 and Exploit-DB

Summary

Unraid 6.8.0 allows authentication bypass.

Patch / fix

cisa required action Apply updates per vendor instructions.

Is CVE-2020-5849 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. First public exploit (Metasploit exploit/linux/http/unraid_auth_bypass_exec)
  2. Published
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
5y ago
Patch by
2022-05-03 (4y 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
last yr.

Exploit prediction

93.24% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-09).

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

References

Sources

Fencer Intel 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.