Is CVE-2011-4755 being actively exploited?

CVE-2011-4755 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-4755?

CVE-2011-4755 has a CVSS 2.0 base score of 10.0 (HIGH).

CVE-2011-4755

HIGH · CVSS 10.0EPSS 1.8%EU EUVD

Parallels Plesk Small Business Panel 10.2.0 does not properly validate string data that is intended for storage in an XML document, which allows remote attackers to cause a denial of service (parsing error) or possibly have unspecified other impact via a crafted cookie, as demonstrated by cookies to client@1/domain@1/hosting/file-manager/ and certain other files.

Key facts

CVSS score: 10.0 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-20
EPSS score: 1.8% (79th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-4673)
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-2011-4673 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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