What is CVE-2021-28655?

CVE-2021-28655 is a medium-severity vulnerability in Apache Zeppelin, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2022-12-16.

How severe is CVE-2021-28655?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Improper input validation in Apache Zeppelin

CVE-2021-28655

The improper Input Validation vulnerability in "”Move folder to Trash” feature of Apache Zeppelin allows an attacker to delete the arbitrary files. This issue affects Apache Zeppelin Apache Zeppelin version 0.9.0 and prior versions.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2022-12-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.016 (74.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.016 · change: +0.000

Affected products

Apache Zeppelin
Apache Software Foundation Zeppelin — versions 0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

lists.apache.org/thread/bxs056g3xlsofz0jb3wny9dw4llwptd2 (vendor-advisory, Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2021-28655?: CVE-2021-28655 is a medium-severity vulnerability in Apache Zeppelin, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2022-12-16.
How severe is CVE-2021-28655?: Medium severity. CVSS v3 base score is 6.5 out of 10.