CVE intelligence and bounded remediation

CVE-2020-1757 — Redhat Undertow security vulnerability

High CVSS 8.1

A flaw was found in all undertow-2.x.x SP1 versions prior to undertow-2.0.30.SP1, all undertow-1.x.x and undertow-2.x.x versions prior to undertow-2.1.0.Final, where the Servlet container causes servletPath to normalize incorrectly by truncating the path after semicolon which may lead to an application mapping resulting in the security bypass.

Severity
High
CVSS
8.1 (3.1)
Published
2020-04-21
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-20, CWE-200

Affected products

  • redhat / undertow
  • redhat / undertow / 2.0.0
  • redhat / undertow / 2.0.25
  • redhat / undertow / 2.0.26
  • redhat / undertow / 2.0.28
  • redhat / jboss_data_grid / 7.0.0

Showing 6 representative product identities from 12 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Information disclosure and sensitive data exposure

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace sensitive data through responses, errors, logs, metrics, traces, caches, exports, files, backups, and client bundles.
  • Identify affected subjects, tenants, retention windows, access controls, and downstream copies without opening unnecessary sensitive records.
  • Review metadata, timing, status, length, and existence signals as well as direct content disclosure.

Remediate safely

  • Minimize collection and output, apply field-level authorization and redaction at a centralized boundary, and return generic external errors.
  • Remove secrets and sensitive data from logs, artifacts, URLs, caches, and client-side bundles; rotate credentials that may have been exposed.
  • Update the affected component and add synthetic-data tests for response, error, observability, and export paths.

Authoritative sources

Complete CVE record and remediation plan

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