cve.bz

CVE-2021-28169

5.3 mediumEPSS 78%

Medium (5.3). EPSS 78% chance of exploitation in the next 30 days. Fixed in org.eclipse.jetty:jetty-servlets 10.0.3, 11.0.3, 9.4.41.

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

CVSS 3.1

5.3 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS
78% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CWE
CWE-200
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-gwcr-j4wh-j3cqMavenorg.eclipse.jetty:jetty-servlets<9.4.419.4.41
GHSA-gwcr-j4wh-j3cqMavenorg.eclipse.jetty:jetty-servlets>=10.0.0 <10.0.310.0.3
GHSA-gwcr-j4wh-j3cqMavenorg.eclipse.jetty:jetty-servlets>=11.0.0 <11.0.311.0.3

References

Check your stackJSON