CVE-2011-4963

5.0 MEDIUM 6% exploit odds Fix listed Disclosure OS & kernel

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 6.0% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2012-07-26 19:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:35 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 6.0% in the next 30 days (EPSS).
Severity: 5.0 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2012-07-26 19:55 UTC
Last modified: 2026-06-16 23:35 UTC
Exploit probability: 6.0% · EPSS, next 30 days
Record status: Modified

Affected

f5 nginx < 1.2.1
f5 nginx 1.3.0

Attack profile CVSS 2.0 · 5.0

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: Partial
Integrity: None
Availability: None

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2011-4963.md and follow it. Check whether this project is affected by CVE-2011-4963. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record