How severe is CVE-2021-28655?

CVE-2021-28655 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2021-28655 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28655?

CVE-2021-28655 affects Apache Zeppelin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28655?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-28655 published?

CVE-2021-28655 was published on 2022-12-16 and last updated on 2026-06-17.

CVE-2021-28655

CVE-2021-28655 is a medium-severity vulnerability in Apache Zeppelin with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apache Zeppelin
Published: 2022-12-16
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-28655?: CVE-2021-28655 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2021-28655 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28655?: CVE-2021-28655 affects Apache Zeppelin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28655?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28655 published?: CVE-2021-28655 was published on 2022-12-16 and last updated on 2026-06-17.

References

https://lists.apache.org/thread/bxs056g3xlsofz0jb3wny9dw4llwptd2

Affected products (1)

cpe:2.3:a:apache:zeppelin:*:*:*:*:*:*:*:*

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