CVE-2018-11784

MEDIUMEPSS 100th pctl

4.3

CVSS v3

Description

When the default servlet in Apache Tomcat versions 9.0.0.M1 to 9.0.11, 8.5.0 to 8.5.33 and 7.0.23 to 7.0.90 returned a redirect to a directory (e.g. redirecting to '/foo/' when the user requested '/foo') a specially crafted URL could be used to cause the redirect to be generated to any URI of the attackers choice.

CWE-601Open Redirect

How to fix

Remediation Available

tomcatAmazon

Fixed in:0:7.0.76-9.amzn2

tomcat-admin-webappsAmazon

Fixed in:0:7.0.76-9.amzn2

tomcat-docs-webappAmazon

Fixed in:0:7.0.76-9.amzn2

tomcat-el-2.2-apiAmazon

Fixed in:0:7.0.76-9.amzn2

tomcat-javadocAmazon

Fixed in:0:7.0.76-9.amzn2

tomcat-jsp-2.2-apiAmazon

Fixed in:0:7.0.76-9.amzn2

tomcat-jsvcAmazon

Fixed in:0:7.0.76-9.amzn2

tomcat-libAmazon

Fixed in:0:7.0.76-9.amzn2

tomcat-servlet-3.0-apiAmazon

Fixed in:0:7.0.76-9.amzn2

tomcat-webappsAmazon

Fixed in:0:7.0.76-9.amzn2

libtomcat7-javaUbuntu

Fixed in:7.0.52-1ubuntu0.16USN-3787-1

This Ubuntu release reached end-of-life on 2019-04-02.

libtomcat8-javaUbuntu

Fixed in:8.0.32-1ubuntu1.8USN-3787-1

This Ubuntu release reached end-of-life on 2021-04-02.

tomcat7Ubuntu

Fixed in:7.0.52-1ubuntu0.16USN-3787-1

This Ubuntu release reached end-of-life on 2019-04-02.

tomcat8Ubuntu

Fixed in:8.0.32-1ubuntu1.8USN-3787-1

This Ubuntu release reached end-of-life on 2021-04-02.

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

94.49%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

Related Vulnerabilities

Other CWE-601 (Open Redirect) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-4123	High	7.6	97%	-	Fix
CVE-2021-22881	Medium	6.1	87%	-	Fix
CVE-2022-45402	Medium	6.1	82%	-	Fix
CVE-2017-1000117	High	8.8	78%	-	Fix
CVE-2019-10098	Medium	6.1	74%	-	Fix
CVE-2020-8143	Medium	6.1	70%	-	Fix

Common questions

How do I fix CVE-2018-11784?

Published advisories record a fix for 14 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2018-11784 being actively exploited?

Not that we know of. CVE-2018-11784 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 94.5% is the estimated probability that it will be exploited in the next 30 days. That is higher than 100% of all scored CVEs.

How severe is CVE-2018-11784?

CVE-2018-11784 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2018-11784 affect?

Published advisories record a fix for tomcat (Amazon), tomcat-admin-webapps (Amazon), tomcat-docs-webapp (Amazon), tomcat-el-2.2-api (Amazon), and 10 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.