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Vulnerability record · CVE-2011-4963 · published 26 July 2012

CVE-2011-4963: F5 nginx vulnerability

F5 · Nginx

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.

5.0 CVSS 2.0 Medium EPSS 6.0% · top 7.0%
5.0CVSS 2.0 base score
6.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://english.securitylab.ru/lab/PT-2012-06 MitigationThird Party Advisory
http://mailman.nginx.org/pipermail/nginx-announce/2012/000086.html MitigationVendor Advisory
http://nginx.org/en/security_advisories.html Vendor Advisory
http://english.securitylab.ru/lab/PT-2012-06 MitigationThird Party Advisory
http://mailman.nginx.org/pipermail/nginx-announce/2012/000086.html MitigationVendor Advisory
http://nginx.org/en/security_advisories.html Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2011-4963), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.