UpHeron
All vulnerabilities

Servers and applications

CVE-2021-28169

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.

Severity
Medium 5.3
Published
9 Jun 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
9.4.41, 10.0.3, 11.0.3
Sources
NVD

Affected software

SoftwareAffected versions
Eclipse JettyServers and applications · cpe:a:eclipse:jetty
  • Every version before 9.4.41
  • From 10.0.0 before 10.0.3
  • From 11.0.0 before 11.0.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-28169
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-28169