Is CVE-2015-3183 in the CISA KEV catalog?

No. CVE-2015-3183 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-3183?

CVE-2015-3183 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2015-3183?

CVE-2015-3183 has an EPSS score of 73.33% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-3183?

Upgrade apache2 on debian 11 to 2.4.16-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2015-3183

MEDIUMEPSS 99th pctl

5.0

CVSS v2

NVD

Description

The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.

CWE-17 CWE-20Improper Input Validation

How to fix

Remediation Available

apache2Debian

Fixed in:2.4.16-1CVE-2015-3183

apache2Ubuntu

Fixed in:2.4.7-1ubuntu4.5USN-2686-1

apache2.2-binUbuntu

Fixed in:2.4.7-1ubuntu4.5USN-2686-1

httpdWindows application

Affected:2.4.0 2.4.16Fixed in:2.4.16Apache Lounge

Affected:2.2.0 2.2.31Fixed in:2.2.31Apache Lounge

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

73.33%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-17 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-0240	High	10.0	88%	-	Fix
CVE-2014-9222	High	10.0	64%	-	-
CVE-2015-4620	High	7.8	38%	-	Fix
CVE-2014-9707	High	7.5	28%	-	-
CVE-2015-2526	Medium	5.0	24%	-	-
CVE-2015-0286	Medium	5.0	21%	-	Fix

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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.