Is CVE-2011-4728 being actively exploited?

CVE-2011-4728 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-4728?

CVE-2011-4728 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2011-4728

MEDIUM · CVSS 5.0EPSS 1.1%EU EUVD

The Server Administration Panel in Parallels Plesk Panel 10.2.0_build1011110331.18 does not set the secure flag for a cookie in an https session, which makes it easier for remote attackers to capture this cookie by intercepting its transmission within an http session, as demonstrated by cookies used by login_up.php3 and certain other files.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness (CWE): CWE-200
EPSS score: 1.1% (65th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-4646)
Published: December 16, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-4646 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

microsoft / windows
parallels / parallels plesk panel
redhat / enterprise linux

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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