8.1

CVSS Score

3.0

-

CVSS Score

Basic Information

CVE ID

CVE-2020-1757

GHSA ID

GHSA-2w73-fqqj-c92p

EPSS Score

0.3644%

CWE

CWE-20

Published

5/24/2022

Updated

1/27/2023

KEV Status

Technology

Java

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

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CVE-2020-1757

CVE-2020-1757: Improper Input Validation in Undertow

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.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2020-1757

CVE-2020-1757:

8.1

CVSS Score

3.0

-

CVSS Score

Basic Information

CVE ID

CVE-2020-1757

GHSA ID

GHSA-2w73-fqqj-c92p

EPSS Score

0.3644%

CWE

CWE-20

Published

5/24/2022

Updated

1/27/2023

KEV Status

Technology

Java

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Technical Details

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
io.undertow:undertow-core	maven	<= 2.0.42	2.1.0

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from improper servletPath normalization where paths containing semicolons are truncated. This would occur in core path resolution functions:

ServletPathMatches.getServletHandlerByPath - Directly handles application mapping logic described in the CVE
HttpServletRequestImpl.getServletPath - Exposes the improperly normalized value to application code While no patch diffs are available, these functions are central to servlet path handling in Undertow and match the vulnerability description of incorrect truncation affecting security mappings. The 'high' confidence for ServletPathMatches comes from its direct role in path resolution, while 'medium' for getServletPath reflects its role in exposing the invalid value.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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8.1

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2020-1757: Improper Input Validation in Undertow

CVE-2020-1757:

8.1

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

CVE-2020-1757: Improper Input Validation in Undertow

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Basic Information

Basic Information

8.1

8.1

Technical Details

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
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