VULNERABILITY INTELLIGENCE
CVE-2021-28169
CVSS score5.3 MEDIUM
EPSS probability78.48%
CISA KEVNot currently listed
Published2021-06-09
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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.
Weakness classification
- emo@eclipse.org: CWE-200
- nvd@nist.gov: NVD-CWE-Other