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NVD / CVE Program· CNA redhat

CVE-2020-1745: A file inclusion vulnerability was found in the AJP connector enabled with a default AJP configuration port of 8009 in Undertow version 2.0.

Noroxi assessment

Priority: Plan (action score 40/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 4.9% (FIRST EPSS); higher than 92.1% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: undertow-io undertow 2.0.30.Final.

Add it to your regular patch cycle. Upgrade to undertow-io undertow 2.0.30.Final or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A file inclusion vulnerability was found in the AJP connector enabled with a default AJP configuration port of 8009 in Undertow version 2.0.29.Final and before and was fixed in 2.0.30.Final. A remote, unauthenticated attacker could exploit this vulnerability to read web application files from a vulnerable server. In instances where the vulnerable server allows file uploads, an attacker could upload malicious JavaServer Pages (JSP) code within a variety of file types and trigger this vulnerability to gain remote code execution.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Apr 28, 2020
Updated
Jun 16, 2026
EPSS
4.9% · 92th percentile

Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 4.9%

CNA vs NVD score

NVD
9.8
CNA · redhat
8.6
1.2 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
redhatundertow

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • redhat undertowup to 2.0.29 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • undertow-io undertow

    • <= 2.0.29.Finalaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:14undertowbefore 2.0.30-12.0.30-1
Mavenio.undertow:undertow-corebefore 2.0.302.0.30
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-apache-commons-beanutilsbefore 0:1.9.4-1.redhat_00002.1.ep7.el70:1.9.4-1.redhat_00002.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-infinispanbefore 0:8.2.11-1.SP2_redhat_00001.1.ep7.el70:8.2.11-1.SP2_redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-infinispan-cachestore-jdbcbefore 0:8.2.11-1.SP2_redhat_00001.1.ep7.el70:8.2.11-1.SP2_redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-infinispan-cachestore-remotebefore 0:8.2.11-1.SP2_redhat_00001.1.ep7.el70:8.2.11-1.SP2_redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-infinispan-client-hotrodbefore 0:8.2.11-1.SP2_redhat_00001.1.ep7.el70:8.2.11-1.SP2_redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-infinispan-commonsbefore 0:8.2.11-1.SP2_redhat_00001.1.ep7.el70:8.2.11-1.SP2_redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-infinispan-corebefore 0:8.2.11-1.SP2_redhat_00001.1.ep7.el70:8.2.11-1.SP2_redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-jackson-databindbefore 0:2.8.11.5-1.redhat_00001.1.ep7.el70:2.8.11.5-1.redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-log4j-jboss-logmanagerbefore 0:1.2.2-1.Final_redhat_00002.1.ep7.el70:1.2.2-1.Final_redhat_00002.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-nettybefore 0:4.1.45-1.Final_redhat_00001.1.ep7.el70:4.1.45-1.Final_redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-netty-allbefore 0:4.1.45-1.Final_redhat_00001.1.ep7.el70:4.1.45-1.Final_redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-undertowbefore 0:1.4.18-12.SP12_redhat_00001.1.ep7.el70:1.4.18-12.SP12_redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-wildflybefore 0:7.1.7-2.GA_redhat_00002.1.ep7.el70:7.1.7-2.GA_redhat_00002.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-wildfly-elytronbefore 0:1.1.13-1.Final_redhat_00001.1.ep7.el70:1.1.13-1.Final_redhat_00001.1.ep7.el7
Red Hat:jboss_enterprise_application_platform_eus:7.1::el7eap7-wildfly-modulesbefore 0:7.1.7-2.GA_redhat_00002.1.ep7.el70:7.1.7-2.GA_redhat_00002.1.ep7.el7
Red Hat:jboss_enterprise_application_platform:7.2::el6eap7-activemq-artemisbefore 0:2.9.0-4.redhat_00010.1.el6eap0:2.9.0-4.redhat_00010.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.2::el6eap7-activemq-artemis-clibefore 0:2.9.0-4.redhat_00010.1.el6eap0:2.9.0-4.redhat_00010.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.2::el6eap7-activemq-artemis-commonsbefore 0:2.9.0-4.redhat_00010.1.el6eap0:2.9.0-4.redhat_00010.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.2::el6eap7-activemq-artemis-core-clientbefore 0:2.9.0-4.redhat_00010.1.el6eap0:2.9.0-4.redhat_00010.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.2::el6eap7-activemq-artemis-dtobefore 0:2.9.0-4.redhat_00010.1.el6eap0:2.9.0-4.redhat_00010.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.2::el6eap7-activemq-artemis-hornetq-protocolbefore 0:2.9.0-4.redhat_00010.1.el6eap0:2.9.0-4.redhat_00010.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.2::el6eap7-activemq-artemis-hqclient-protocolbefore 0:2.9.0-4.redhat_00010.1.el6eap0:2.9.0-4.redhat_00010.1.el6eap

+96

Same product

redhat: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-10212A flaw was found in, all under 2.0.20, in the Undertow DEBUG log for io.undertow.request.security.
    40Plan
  • CVE-2019-3888A vulnerability was found in Undertow web server before 2.0.21.
    40Plan
  • CVE-2014-7816Directory traversal vulnerability in JBoss Undertow 1.0.x before 1.0.17, 1.1.x before 1.1.0.CR5, and 1.2.x before 1.2.0.Beta3, when running
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2019-14888Jan 23, 2020 · A vulnerability was found in the Undertow HTTP server in versions before 2.0.28.SP1 when listening on HTTPS.
    31Monitor
  • ← EarlierCVE-2020-1757Apr 21, 2020 · 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 un
    32Monitor
  • Later →CVE-2020-10719May 26, 2020 · A flaw was found in Undertow in versions before 2.1.1.Final, regarding the processing of invalid HTTP requests with large chunk sizes.
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
undertow-io undertow2.0.30.Final · descriptionVendor (CNA)
debian:undertow2.0.30-1 · Debian:14Package registry (OSV)
Maven:io.undertow:undertow-core2.0.30Package registry (OSV)
red hat:eap7-activemq-artemis0:2.9.0-4.redhat_00010.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.2::el6Package registry (OSV)
red hat:eap7-activemq-artemis-cli0:2.9.0-4.redhat_00010.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.2::el6Package registry (OSV)
red hat:eap7-activemq-artemis-commons0:2.9.0-4.redhat_00010.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.2::el6Package registry (OSV)
red hat:eap7-jaegertracing-jaeger-client-java0:0.34.1-1.redhat_00002.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6Package registry (OSV)
red hat:eap7-jaegertracing-jaeger-client-java-core0:0.34.1-1.redhat_00002.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6Package registry (OSV)
red hat:eap7-jaegertracing-jaeger-client-java-thrift0:0.34.1-1.redhat_00002.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6Package registry (OSV)
red hat:eap7-thrift0:0.13.0-1.redhat_00002.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6Package registry (OSV)
red hat:eap7-undertow0:2.0.28-4.SP1_redhat_00002.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.2::el6Package registry (OSV)
red hat:eap7-wildfly-openssl0:1.0.9-2.SP03_redhat_00001.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6Package registry (OSV)
red hat:eap7-wildfly-openssl-java0:1.0.9-2.SP03_redhat_00001.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6Package registry (OSV)
red hat:eap7-wildfly-openssl-linux-x86_640:1.0.9-2.SP03_redhat_00001.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6Package registry (OSV)
red hat:eap7-wildfly-openssl-linux-x86_64-debuginfo0:1.0.9-2.SP03_redhat_00001.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-285 · Improper Authorization

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records