CVE intelligence and bounded remediation

CVE-2021-28163 — Eclipse Jetty security vulnerability

Medium CVSS 4

In Eclipse Jetty 9.4.32 to 9.4.38, 10.0.0.beta2 to 10.0.1, and 11.0.0.beta2 to 11.0.1, if a user uses a webapps directory that is a symlink, the contents of the webapps directory is deployed as a static webapp, inadvertently serving the webapps themselves and anything else that might be in that directory.

Severity
Medium
CVSS
4 (2.0)
Published
2021-04-01
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-200, CWE-59

Affected products

  • eclipse / jetty
  • eclipse / jetty / 10.0.0
  • eclipse / jetty / 10.0.1
  • eclipse / jetty / 11.0.0
  • eclipse / jetty / 11.0.1
  • fedoraproject / fedora / 32

Showing 6 representative product identities from 33 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Path traversal, unsafe upload, and file handling

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Check exposure

  • Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
  • Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
  • Review canonicalization and containment checks across supported operating systems and storage backends.

Remediate safely

  • Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
  • Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
  • Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.

Authoritative sources

Complete CVE record and remediation plan

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