CVE-2020-13953: Improper file downloads in Apache Tapestry
Summary
CVE-2020-13953: Improper file downloads in Apache Tapestry. Affects org.apache.tapestry:tapestry-core versions >= 5.4.0, < 5.6.0. Fixed in 5.6.0. How to fix ↓
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Background
Apache Tapestry is a powerful, open-source component-oriented web application framework for Java. It simplifies the development of dynamic, scalable, and secure web applications. The tapestry-core package is a core component of Apache Tapestry, providing essential functionality for building web applications. Unfortunately, versions 5.4.0 to 5.5.0 of tapestry-core are vulnerable to an improper file download issue.
Vulnerability Detail
The vulnerability in Apache Tapestry allows an attacker to download files from the WEB-INF folder of the running WAR (Web Application Archive). By crafting specific URLs, an attacker can bypass access restrictions and retrieve sensitive files that should not be directly accessible to users. This can lead to unauthorized access to sensitive information, such as configuration files, database credentials, or other confidential data stored within the WEB-INF folder.
How To Fix
Latest published version: 5.9.1 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
5.6.0
This is the first release that contains the fix.
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Workaround
There is no known workaround for this vulnerability. It is essential to upgrade to the fixed version of Apache Tapestry to ensure the security of the application.
Conclusion
The vulnerability in Apache Tapestry's tapestry-core package allows attackers to download sensitive files from the WEB-INF folder, potentially leading to unauthorized access and exposure of confidential information. To mitigate this risk, it is crucial to upgrade to the fixed version of Apache Tapestry (5.6.0 or later). For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
Apache Tapestry is an open-source web application framework for Java, designed to simplify the development of dynamic and secure web applications.
This vulnerability allows an attacker to download sensitive files from the WEB-INF folder, potentially exposing confidential information and compromising the security of the application.
Versions 5.4.0 to 5.5.0 of Apache Tapestry's tapestry-core package are affected by this vulnerability.
Yes, the vulnerability has been fixed in Apache Tapestry version 5.6.0 and later. It is recommended to upgrade to the fixed version to mitigate the risk.
No, there are no known workarounds for this vulnerability. Upgrading to the fixed version is the only solution.
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