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CVE

CVE-2021-28169

5.3

CVSSmedium

Exploitable remotely over the internet · no authentication required.

Description

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.

Attack Vector

Network

Privileges Req.

None

User Interaction

None

eclipse jetty

Updated Oct 24, 2026View on NVD →

S4E scanner

mediumProduct Based Web Vulnerabilities~10 seconds

CVE-2021-28169 Scanner

Detects 'Information Disclosure' vulnerability in Eclipse Jetty affects v. <= 9.4.40, <= 10.0.2, <= 11.0.2.

Used 2.4k times · 3.4k assets checked · url

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CVE history: eclipse jetty

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