Is CVE-2011-4756 being actively exploited?

CVE-2011-4756 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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

CVE-2011-4756 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2011-4756

MEDIUM · CVSS 5.0EPSS 1.1%EU EUVD

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.

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-2011-4674)
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-2011-4674 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

parallels / parallels plesk small business panel

References

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

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