How severe is CVE-2011-4764?

CVE-2011-4764 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2011-4764 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4764?

CVE-2011-4764 affects Parallels Parallels Plesk Small Business Panel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-4764?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-4764 published?

CVE-2011-4764 was published on 2011-12-16 and last updated on 2026-06-16.

CVE-2011-4764

CVE-2011-4764 is a medium-severity vulnerability in Parallels Parallels Plesk Small Business Panel with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Parallels Parallels Plesk Small Business Panel
Published: 2011-12-16
Last modified: 2026-06-16

Description

Multiple cross-site scripting (XSS) vulnerabilities in the Site Editor (aka SiteBuilder) feature in Parallels Plesk Small Business Panel 10.2.0 allow remote attackers to inject arbitrary web script or HTML via crafted input to a PHP script, as demonstrated by Wizard/Edit/Modules/Image and certain other files.

Frequently asked questions

What is CVE-2011-4764?: Multiple cross-site scripting (XSS) vulnerabilities in the Site Editor (aka SiteBuilder) feature in Parallels Plesk Small Business Panel 10.2.0 allow remote attackers to inject arbitrary web script or HTML via crafted input to a PHP script, as demonstrated by Wizard/Edit/Modules/Image and certain other files.
How severe is CVE-2011-4764?: CVE-2011-4764 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-4764 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4764?: CVE-2011-4764 affects Parallels Parallels Plesk Small Business Panel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-4764?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4764 published?: CVE-2011-4764 was published on 2011-12-16 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:parallels:parallels_plesk_small_business_panel:10.2.0:*:*:*:*:*:*:*

More vulnerabilities in Parallels Parallels Plesk Small Business Panel

CVE-2011-4768 — Critical (CVSS 10.0): The Site Editor (aka SiteBuilder) feature in Parallels Plesk Small Business Panel 10.2.0 omits the Content-Type…
CVE-2011-4762 — Critical (CVSS 10.0): Parallels Plesk Small Business Panel 10.2.0 sends incorrect Content-Type headers for certain resources, which might…
CVE-2011-4761 — Critical (CVSS 10.0): Parallels Plesk Small Business Panel 10.2.0 omits the Content-Type header's charset parameter for certain resources,…
CVE-2011-4757 — Critical (CVSS 10.0): Parallels Plesk Small Business Panel 10.2.0 generates a password form field without disabling the autocomplete feature,…
CVE-2011-4755 — Critical (CVSS 10.0): Parallels Plesk Small Business Panel 10.2.0 does not properly validate string data that is intended for storage in an…
CVE-2011-4763 — High (CVSS 7.5): Multiple SQL injection vulnerabilities in the Site Editor (aka SiteBuilder) feature in Parallels Plesk Small Business…

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