CVE-2021-28169: Debian Linux

Medium severity, CVSS 5.3. EPSS: 78.5% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Eclipse Jetty: before 9.4.41 (fixed in 9.4.41); from 10.0.0, before 10.0.3 (fixed in 10.0.3); from 11.0.0, before 11.0.3 (fixed in 11.0.3)
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp Hci: affected versions not specified
• Netapp Management Services For Element Software: affected versions not specified
• Netapp Snap Creator Framework: affected versions not specified
• Oracle Communications Cloud Native Core Policy: version 1.14.0 only
• Oracle Rest Data Services: before 21.3 (fixed in 21.3)

Published 2021-06-09. Last modified 2026-06-17.