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CVE-2011-4968

20
FAUCET Score

CVE-2011-4968 describes a vulnerability in the nginx http proxy module where it fails to verify the identity of an HTTPS origin server. This flaw, affecting Debian and F5 Nginx products, could enable a man-in-the-middle (MITM) attack. With a CVSS score of 4.8 (Medium), exploitation requires high attack complexity but could lead to limited confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
0.7.61CPE matchmatch criteria
cpe:2.3:a:f5:nginx:0.7.61:*:*:*:*:*:*:*
0.7.62CPE matchmatch criteria
cpe:2.3:a:f5:nginx:0.7.62:*:*:*:*:*:*:*
0.7.64CPE matchmatch criteria
cpe:2.3:a:f5:nginx:0.7.64:*:*:*:*:*:*:*
0.7.65CPE matchmatch criteria
cpe:2.3:a:f5:nginx:0.7.65:*:*:*:*:*:*:*
0.7.66CPE matchmatch criteria
cpe:2.3:a:f5:nginx:0.7.66:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.99%
Probability of exploitation in next 30 days
EPSS Percentile
89.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0399 is in the 86th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia nvd_reference
View patch

References

access.redhat.com / security/cve/cve-2011-4968
Broken Link
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
bugzilla.suse.com / show_bug.cgi
Issue TrackingThird Party Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/80952
Third Party AdvisoryVDB Entry
security-tracker.debian.org / tracker/CVE-2011-4968
Third Party Advisory
openwall.com / lists/oss-security/2013/01/03/8
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/57139
Third Party AdvisoryVDB Entry