CVE-2011-5239

CiviCRM 4.0.5 and 4.1.1 does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

Published: 2012-11-06 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-5239 is rated Low Risk (37.4/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.18%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-5239

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-09-15 0.13% 0.18% +0.05%
2 2025-03-30 0.16% 0.13% -0.03%
3 2025-03-29 — 0.16% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-5239

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2011-5239

OS Trackers for CVE-2011-5239

vendor priority summary link
debian unimportant CVE-2011-5239 unimportant priority: Debian including 1 source packages (civicrm), 1 status rows across 1 suites (bullseye): resolved 1. https://security-tracker.debian.org/tracker/CVE-2011-5239

Affected software / configurations for CVE-2011-5239

Vendor Product Version Raw CPE
civicrm civicrm 4.0.5 cpe:2.3:a:civicrm:civicrm:4.0.5:*:*:*:*:*:*:*
civicrm civicrm 4.1.1 cpe:2.3:a:civicrm:civicrm:4.1.1:*:*:*:*:*:*:*

References for CVE-2011-5239

cvelogic Threat Intelligence