For Eclipse Jetty versions <= 9.4.40, <= 10.0.2, <= 11.0.2, it is possible for requests to the ConcatServlet with a doubly encoded path to a

Summary

For Eclipse Jetty versions <= 9.4.40, <= 10.0.2, <= 11.0.2, it is possible for requests to the ConcatServlet with a doubly encoded path to access protected resources within the WEB-INF directory. For example a request to `/concat?/%2557EB-INF/web.xml` can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.

Timeline

1. Jun 9, 2021, 1:55 AM UTCCVE published
2. Aug 3, 2024, 9:40 PM UTCRecord last updated
3. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• The Eclipse Foundation Eclipse Jetty

  through 9.4.40; through 10.0.2; through 11.0.2

• org.eclipse.jetty:jetty-servletsMaven

  fixed in 9.4.41

• org.eclipse.jetty:jetty-servletsMaven

  From 10.0.0 · fixed in 10.0.3

• org.eclipse.jetty:jetty-servletsMaven

  From 11.0.0 · fixed in 11.0.3

References 25