CVE-2018-1000621: Mycroft AI mycroft-core version 18.2.8b and earlier contains a Incorrect Access Control vulnerability in Webso

Q: How do I fix CVE-2018-1000621?

mycroft-core: upgrade to newer than 18.2.8b. Exact commands for each OS are on this page.

Q: Is CVE-2018-1000621 being exploited?

CVE-2018-1000621 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-1000621 affect?

CVE-2018-1000621 affects mycroft-core. Severity is high (CVSS 8.1). Mycroft AI mycroft-core version 18.2.8b and earlier contains a Incorrect Access Control vulnerability in Websocket configuration that can result in code execution. This impacts ONLY the Mycroft for Linux and "non-enclosure" installs - Mark

Q: How urgent is CVE-2018-1000621?

Priority 60/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.1REMOTEUPGRADE

CVE-2018-1000621 is a high-severity flaw (CVSS 8.1) affecting mycroft-core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Mycroft AI mycroft-core version 18.2.8b and earlier contains a Incorrect Access Control vulnerability in Websocket configuration that can result in code execution. This impacts ONLY the Mycroft for Linux and "non-enclosure" installs - Mark 1 and Picroft unaffected. This attack appear to be exploitable remote access to the unsecured websocket server. This vulnerability appears to have been fixed in No fix currently available.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-732
Published	2018-07-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mycroft

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-07-09 20:29 UTCPublished CVE record published
2026-06-17 01:32 UTCUpdated Record last modified

mycroft mycroft-core UPGRADE

Affected: <= 18.2.8b

Fixed in: newer than 18.2.8b

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mycroft-core || rpm -q mycroft-core || mycroft-core --version

2. UPGRADE to newer than 18.2.8b (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mycroft-core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mycroft-core

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-1000621?

mycroft-core: upgrade to newer than 18.2.8b. Exact commands for each OS are on this page.

Is CVE-2018-1000621 being exploited?

CVE-2018-1000621 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-1000621 affect?

CVE-2018-1000621 affects mycroft-core. Severity is high (CVSS 8.1). Mycroft AI mycroft-core version 18.2.8b and earlier contains a Incorrect Access Control vulnerability in Websocket configuration that can result in code execution. This impacts ONLY the Mycroft for Linux and "non-enclosure" installs - Mark

How urgent is CVE-2018-1000621?

Priority 60/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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