Is CVE-2011-4756 actively exploited?

No active exploitation of CVE-2011-4756 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2011-4756 be exploited remotely?

Yes. CVE-2011-4756 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2011-4756?

CVE-2011-4756 has a CVSS score of 5.0 (MEDIUM).

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MEDIUM

CVE-2011-4756

CWE-200Published: December 16, 2011· Updated: Jun 16, 2026

5.0

CVSS v3.1

Official Description

Parallels Plesk Small Business Panel 10.2.0 does not include the HTTPOnly flag in a Set-Cookie header for a cookie, which makes it easier for remote attackers to obtain potentially sensitive information via script access to this cookie, as demonstrated by cookies used by domains/sitebuilder_edit.php and certain other files.

NVD Source

Technical Analysis

CVE-2011-4756 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.