What is the CVSS score of CVE-2018-8034?

CVE-2018-8034 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 21.3%.

Is there a patch available for CVE-2018-8034?

Yes, a patch is available for CVE-2018-8034. Update the affected software to the latest version immediately.

Tomcat CVE-2018-8034

HIGH

Improper Certificate Validation (CWE-295)

2018-08-01 security@apache.org

Apache Information Disclosure Debian Oracle Tomcat Canonical Debian Linux Ubuntu Linux Retail Order Broker

7.5

CVSS 3.1 · Vendor: apache

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Vulnerability Assessment

Weakness	CWE CWE-295 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V12 - Secure Communication Certificate validation
Impact	CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity + EPSS > 10%.

Patch available 21.3% exploitation probability (EPSS)

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AnalysisAI

The host name verification when using TLS with the WebSocket client was missing. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

maven org.apache.tomcat.embed:tomcat-embed-core fix: 7.0.90, 8.0.53, 8.5.32, 9.0.10

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in maven

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-295. The host name verification when using TLS with the WebSocket client was missing. It is now enabled by default. Versions Affected: Apache Tomcat 9.0.0.M1 to 9.0.9, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, and 7.0.35 to 7.0.88. Affected products include: Apache Tomcat, Canonical Ubuntu Linux, Debian Debian Linux, Oracle Retail Order Broker.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (apache) PRIMARY 7.5 HIGH

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

Primary rating from Vendor (apache) · only source for this CVE.

CVSS VectorVendor: apache

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

DescriptionCVE.org

The host name verification when using TLS with the WebSocket client was missing. It is now enabled by default. Versions Affected: Apache Tomcat 9.0.0.M1 to 9.0.9, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, and 7.0.35 to 7.0.88.

Threat Intelligence Overview

EPSS Score

21.3%

Top 3% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 21.3%

Patch available Yes

Active threat No

Deciding rule

HIGH severity + EPSS > 10%

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +21

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.0.0:rc1:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.0.0:rc10:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.0.0:rc2:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.0.0:rc3:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.0.0:rc4:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.0.0:rc5:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.0.0:rc6:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.0.0:rc7:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.0.0:rc8:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.0.0:rc9:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone1:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone10:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone12:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone13:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone14:*:*:*:*:*:*

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