CVE-2011-4968

Name: CVE-2011-4968
Creator: NVD / NIST
Published: 2019-11-19T16:15:11.07+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 3.99%

Last modified Jun 16, 2026

CVE-2011-4968 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. nginx http proxy module does not verify peer identity of https origin server which could facilitate man-in-the-middle attack (MITM). EPSS estimates a 3.99% chance of exploitation in the next 30 days.

Description

nginx http proxy module does not verify peer identity of https origin server which could facilitate man-in-the-middle attack (MITM)

Metrics

CVSS 3.1

4.8/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

3.99%

89.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
F5	Nginx	0.7.61
F5	Nginx	0.7.62
F5	Nginx	0.7.64
F5	Nginx	0.7.65
F5	Nginx	0.7.66
F5	Nginx	0.8.33
F5	Nginx	0.8.35
F5	Nginx	0.8.36
F5	Nginx	0.8.40
F5	Nginx	1.2.6
Debian	Debian Linux	8.0

References

http://www.openwall.com/lists/oss-security/2013/01/03/8Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/57139Third Party Advisory, VDB Entry
https://access.redhat.com/security/cve/cve-2011-4968Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4968Issue Tracking, Patch, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2011-4968Issue Tracking, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/80952Third Party Advisory, VDB Entry
https://security-tracker.debian.org/tracker/CVE-2011-4968Third Party Advisory
http://www.openwall.com/lists/oss-security/2013/01/03/8Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/57139Third Party Advisory, VDB Entry
https://access.redhat.com/security/cve/cve-2011-4968Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4968Issue Tracking, Patch, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2011-4968Issue Tracking, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/80952Third Party Advisory, VDB Entry
https://security-tracker.debian.org/tracker/CVE-2011-4968Third Party Advisory

Timeline

Published: Nov 19, 2019
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-4968?

nginx http proxy module does not verify peer identity of https origin server which could facilitate man-in-the-middle attack (MITM)

How severe is CVE-2011-4968?

CVE-2011-4968 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 3.99% probability of exploitation in the next 30 days.

How do I fix CVE-2011-4968?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-4968?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST