What is CVE-2021-39233?

CVE-2021-39233 is a critical-severity vulnerability in Apache Ozone, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2021-11-19.

How severe is CVE-2021-39233?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Apache Ozone

CVE-2021-39233

In Apache Ozone versions prior to 1.2.0, Container related Datanode requests of Ozone Datanode were not properly authorized and can be called by any client.

Vulnerability class: Broken Authentication

Published 2021-11-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.024 (83.7th percentile), scored 2026-10-22.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Apache Ozone
Apache Software Foundation Ozone — versions 1.1

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

mail-archives.apache.org/mod_mbox/ozone-dev/202111.mbox/<394a9a73-44dd-b5db-84d… (Mailing List, Vendor Advisory)
www.openwall.com/lists/oss-security/2021/11/19/4 (mailing-list, Third Party Advisory)

Frequently asked questions

What is CVE-2021-39233?: CVE-2021-39233 is a critical-severity vulnerability in Apache Ozone, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2021-11-19.
How severe is CVE-2021-39233?: Critical severity. CVSS v3 base score is 9.1 out of 10.