Is CVE-2013-4547 in the CISA KEV catalog?

No. CVE-2013-4547 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-4547?

CVE-2013-4547 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2013-4547?

CVE-2013-4547 has an EPSS score of 67.72% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2013-4547?

Upgrade nginx on debian 11 to 1.4.4-1 or later.

CVE & CISA-KEV Catalog

CVE-2013-4547

HIGHEPSS 99th pctl

7.5

CVSS v2

NVD

Description

nginx 0.8.41 through 1.4.3 and 1.5.x before 1.5.7 allows remote attackers to bypass intended restrictions via an unescaped space character in a URI.

CWE-116

How to fix

Remediation Available

nginxDebian

Fixed in:1.4.4-1CVE-2013-4547

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

67.72%probability of exploitation in 30 days

99thpercentile

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

References

Vendor Advisory1

mailman.nginx.org

Third-Party Advisory7

Other references1

debian.org

Related Vulnerabilities

Other CWE-116 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-38475	Critical	9.1	100%	KEV	Fix
CVE-2022-36446	Critical	9.8	96%	-	Fix
CVE-2021-31806	Medium	6.5	96%	-	Fix
CVE-2022-30781	High	7.5	88%	-	Fix
CVE-2022-36099	Critical	9.9	76%	-	Fix
CVE-2022-36100	Critical	9.9	74%	-	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 2026-04-29.