Is CVE-2011-4963 being actively exploited?

CVE-2011-4963 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-4963?

CVE-2011-4963 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2011-4963

MEDIUM · CVSS 5.0EPSS 6.0%EU EUVD

nginx/Windows 1.3.x before 1.3.1 and 1.2.x before 1.2.1 allows remote attackers to bypass intended access restrictions and access restricted files via (1) a trailing . (dot) or (2) certain "$index_allocation" sequences in a request.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
EPSS score: 6.0% (93th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-4869)
Published: July 26, 2012
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-4869 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.

View on the EU Vulnerability Database

Affected products

f5 / nginx
f5 / nginx
microsoft / windows

References

http://english.securitylab.ru/lab/PT-2012-06(Mitigation, Third Party Advisory)
http://mailman.nginx.org/pipermail/nginx-announce/2012/000086.html(Mitigation, Vendor Advisory)
http://nginx.org/en/security_advisories.html(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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