← Vulnerability feed

Vulnerability record · CVE-2020-1757 · published 21 April 2020

CVE-2020-1757: Redhat undertow improper input validation vulnerability

Redhat · 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.

8.1 CVSS 3.1 High EPSS 1.6% · top 25.4% CWE-20 · Improper input validationCWE-200 · Information exposure
8.1CVSS 3.1 base score, v2 5.5
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1757 Issue TrackingVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1757 Issue TrackingVendor Advisory

Track CVE-2020-1757 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2017-12149JBoss HTTP Invoker deserialization allows remote code executionThe ReadOnlyAccessFilter doFilter method in the JBoss HTTP Invoker deserializes untrusted data without restricting which classes can be loaded. An un…KEVEPSS 91%analysed8.8CVE-2010-1871JBoss Seam 2 EL injection allows remote code executionJBoss Seam 2, as shipped in JBoss Enterprise Application Platform 4.3.0 for Red Hat Linux, fails to sanitize input used in JBoss Expression Language …KEVEPSS 83%analysed8.1CVE-2017-12617Apache Tomcat Default Servlet JSP upload leads to remote code executionApache Tomcat with HTTP PUT enabled (for example, the Default servlet readonly parameter set to false) allows an attacker to upload a JSP file throug…KEVEPSS 100%analysed7.5CVE-2023-44487HTTP/2 Rapid Reset stream cancellation denial of serviceThe HTTP/2 protocol permits a client to cancel many streams quickly, and the server's handling of those resets consumes disproportionate resources. T…KEVEPSS 100%analysed7.5CVE-2010-1428JBoss EAP Web Console access control bypass via non-GET/POST methodsThe Web Console in JBoss Enterprise Application Platform enforces access control only for GET and POST requests, so any other HTTP method bypasses th…KEVEPSS 62%analysed5.3CVE-2010-0738JBoss JMX-Console access control bypass via non-GET/POST HTTP methodsThe JMX-Console web application in Red Hat JBoss EAP 4.2 before 4.2.0.CP09 and 4.3 before 4.3.0.CP08 enforces access control only for GET and POST re…KEVEPSS 79%analysed10.0CVE-2018-14721Fasterxml jackson-databind server-side request forgery (ssrf) vulnerabilityFasterXML jackson-databind 2.x before 2.9.7 might allow remote attackers to conduct server-side request forgery (SSRF) attacks by leveraging failure …EPSS 10%9.8CVE-2022-4039Redhat single sign-on incorrect default permissions vulnerabilityA flaw was found in Red Hat Single Sign-On for OpenShift container images, which are configured with an unsecured management interface enabled. This …EPSS 0.79%

Source: NIST National Vulnerability Database (record CVE-2020-1757), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.