CVE-2020-5849 — Unraid Authentication Bypass Vulnerability

Unraid 6.8.0 allows authentication bypass.

01What is this vulnerability?

Unraid 6.8.0 allows authentication bypass.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2021-11-03. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

08Timeline

• Published: 2020-03-16T17:24:23.000Z
• Last modified: 2025-10-21T23:35:48.316Z
• Added to CISA KEV: 2021-11-03
• BOD 22-01 due: 2022-05-03

09References

• sysdream.com — https://sysdream.com/news/lab/
• forums.unraid.net — https://forums.unraid.net/forum/7-announcements/
• sysdream.com — https://sysdream.com/news/lab/2020-02-06-cve-2020-5847-cve-2020-5849-unraid-6-8-…
• packetstormsecurity.com — http://packetstormsecurity.com/files/157275/Unraid-6.8.0-Authentication-Bypass-A…