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Fencer Vulns
high 7.5

CVE-2013-4547 in the critical feed json

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…

published 2013-11-23 12 y ago modified 2026-06-16 4 mo ago also EUVD-2013-4406

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
67.7%
EPSS 67.7% chance of exploitation in 30 days, percentile 99.3%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • f5 nginx 1.4.4
  • nginx Debian 14, Debian 13, Debian 12 1.4.4-1

debian advisories DEBIAN-CVE-2013-4547

  • nginx openSUSE Tumbleweed 1.11.4-2.5

opensuse advisories openSUSE-SU-2024:10044-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-4547 updated cvss 6.4

nginx: security restriction bypass flaw due to whitespace parsing

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-38846)
  2. Published

Exploit prediction

67.72% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-38846 Nginx 1.1.17 - URI Processing SecURIty Bypass remote, 2013-11-19

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-116 Improper Encoding or Escaping of Output
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.