CVE-2021-28655: Apache Zeppelin Improper Input Validation vulnerability
Summary
CVE-2021-28655: Apache Zeppelin Improper Input Validation vulnerability. Affects org.apache.zeppelin:zeppelin versions < 0.10.0. Fixed in 0.10.0. How to fix ↓
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Background
Apache Zeppelin is an open-source web-based notebook that enables interactive data analytics and collaborative data science. It provides an interface for users to create and execute code snippets, visualizations, and interactive dashboards. The Move folder to Trash feature in Apache Zeppelin allows users to delete folders. However, an improper input validation vulnerability in this feature allows an attacker to delete arbitrary files, potentially leading to data loss or unauthorized access to sensitive information. This vulnerability affects Apache Zeppelin version 0.9.0 and prior versions.
Vulnerability Detail
The improper input validation vulnerability in Apache Zeppelin's Move folder to Trash feature allows an attacker to delete arbitrary files. By exploiting this vulnerability, an attacker can manipulate the input to the feature and delete files that they should not have access to. This can lead to data loss, unauthorized access to sensitive information, or disruption of the application's functionality. The vulnerability has a CVSS score of 6.5, indicating a moderate severity level.
How To Fix
Latest published version: 0.12.1 as of 22 Oct 2026
Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
0.10.0
This is the first release that contains the fix.
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Workaround
As a temporary workaround, users can disable the Move folder to Trash feature in Apache Zeppelin to prevent potential exploitation of the vulnerability. This can be done by modifying the application's configuration or by removing the corresponding functionality from the codebase. However, it is recommended to apply the official fix by upgrading to the latest version of Apache Zeppelin as soon as possible.
Conclusion
The improper input validation vulnerability in Apache Zeppelin's Move folder to Trash feature can allow an attacker to delete arbitrary files, potentially leading to data loss or unauthorized access to sensitive information. Users of Apache Zeppelin should upgrade to version 0.10.0 or later to fix this vulnerability. As a temporary workaround, the Move folder to Trash feature can be disabled. For further support on vulnerability remediation, contact DevNack.com.
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FAQ
Apache Zeppelin is an open-source web-based notebook that enables interactive data analytics and collaborative data science. It provides an interface for users to create and execute code snippets, visualizations, and interactive dashboards.
The Move folder to Trash feature in Apache Zeppelin allows users to delete folders. It is designed to provide a way to remove unwanted or unnecessary folders from the application.
The vulnerability occurs due to insufficient input validation in the Move folder to Trash feature. An attacker can manipulate the input to the feature and delete arbitrary files, potentially leading to data loss or unauthorized access to sensitive information.
The vulnerability can result in data loss, unauthorized access to sensitive information, or disruption of the application's functionality. An attacker can delete files that they should not have access to, potentially causing significant damage or compromising the integrity of the system.
To fix this vulnerability, users of Apache Zeppelin should upgrade to version 0.10.0 or later. The upgrade includes a fix for the improper input validation issue in the Move folder to Trash feature. Users can download the latest version from the official Apache Zeppelin website or update their Maven dependencies to include the updated version of the package.
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