CVE & CISA-KEV Catalog

CVE-2016-5388

HIGHEPSS 99th pctl
8.1
CVSS v3
NVD

Description

Apache Tomcat 7.x through 7.0.70 and 8.x through 8.5.4, when the CGI Servlet is enabled, follows RFC 3875 section 4.1.18 and therefore does not protect applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect an application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue. NOTE: the vendor states "A mitigation is planned for future releases of Tomcat, tracked as CVE-2016-5388"; in other words, this is not a CVE ID for a vulnerability.

CWE-284Improper Access Control

How to fix

Remediation Available
libservlet3.0-javaUbuntu
Fixed in:7.0.68-1ubuntu0.4+esm1USN-4791-1
libtomcat7-javaUbuntu
Fixed in:7.0.52-1ubuntu0.8USN-3177-1
Fixed in:7.0.68-1ubuntu0.4+esm1USN-4791-1
libtomcat8-javaUbuntu
Fixed in:8.0.32-1ubuntu1.3USN-3177-1
tomcat7Ubuntu
Fixed in:7.0.52-1ubuntu0.8USN-3177-1
Fixed in:7.0.68-1ubuntu0.4+esm1USN-4791-1
tomcat7-adminUbuntu
Fixed in:7.0.68-1ubuntu0.4+esm1USN-4791-1
tomcat7-commonUbuntu
Fixed in:7.0.68-1ubuntu0.4+esm1USN-4791-1
tomcat7-userUbuntu
Fixed in:7.0.68-1ubuntu0.4+esm1USN-4791-1
tomcat8Ubuntu
Fixed in:8.0.32-1ubuntu1.3USN-3177-1

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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 ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

50.90%probability of exploitation in 30 days
99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Related Vulnerabilities

Other CWE-284 (Improper Access Control) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-27350Critical9.8100%KEV + RansomFix
CVE-2019-1653High7.5100%KEV-
CVE-2023-23752Medium5.3100%KEVFix
CVE-2023-38205High7.5100%KEV-
CVE-2023-29298High7.5100%KEV-
CVE-2024-27348Critical9.899%KEVFix
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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 2026-05-06.