Access Restriction Bypass Affecting org.eclipse.jetty:jetty-webapp package, versions [9.4.37,9.4.43) [10.0.1,10.0.6) [11.0.1,11.0.6)

  • Exploit Maturity


  • Attack Complexity


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  • snyk-id


  • published

    16 Jul 2021

  • disclosed

    16 Jul 2021

  • credit

    cangqingzhe, CloverSecLabs

How to fix?

Upgrade org.eclipse.jetty:jetty-webapp to version 9.4.43, 10.0.6, 11.0.6 or higher.


org.eclipse.jetty:jetty-webapp is a maven plugin for Jetty web application support.

Affected versions of this package are vulnerable to Access Restriction Bypass. URIs can be crafted using some encoded characters to access the content of the WEB-INF directory and/or bypass some security constraints. For example, a request to /%u002e/WEB-INF/web.xml can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application. Similarly, an encoded null character can prevent correct normalization so that /.%00/WEB-INF/web.xml can also retrieve the web.xml file.