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CVE-2020-5847

Unraid Remote Code Execution

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 95.8%
  1. Published16 Mar 2020
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due3 May 2022
Actively exploited (CISA KEV)

Unraid contains a vulnerability due to the insecure use of the extract PHP function that can be abused to execute remote code as root. This CVE is chainable with CVE-2020-5849 for initial access.

Added to KEV: 3 Nov 2021Federal remediation due: 3 May 2022

Description

Unraid through 6.8.0 allows Remote Code Execution.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Unraid≤ 6.8.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Frequently asked

Is CVE-2020-5847 being actively exploited?

Yes. CVE-2020-5847 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2020-5847?

CVE-2020-5847 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 95.8% probability of exploitation.

Which products are affected by CVE-2020-5847?

Affected products include Unraid.

How do I fix CVE-2020-5847?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2020-5847 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.