How severe is CVE-2011-4749?

CVE-2011-4749 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2011-4749 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4749?

CVE-2011-4749 affects Parallels Parallels Plesk Panel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-4749?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-4749 published?

CVE-2011-4749 was published on 2011-12-16 and last updated on 2026-06-16.

CVE-2011-4749

CVE-2011-4749 is a critical-severity vulnerability in Parallels Parallels Plesk Panel with a CVSS 2.0 base score of 10.0. 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-255.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-255
Affected product: Parallels Parallels Plesk Panel
Published: 2011-12-16
Last modified: 2026-06-16

Description

The billing system for Parallels Plesk Panel 10.3.1_build1013110726.09 generates a password form field without disabling the autocomplete feature, which makes it easier for remote attackers to bypass authentication by leveraging an unattended workstation, as demonstrated by forms on certain pages under admin/index.php/default.

Frequently asked questions

What is CVE-2011-4749?: The billing system for Parallels Plesk Panel 10.3.1_build1013110726.09 generates a password form field without disabling the autocomplete feature, which makes it easier for remote attackers to bypass authentication by leveraging an unattended workstation, as demonstrated by forms on certain pages under admin/index.php/default.
How severe is CVE-2011-4749?: CVE-2011-4749 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2011-4749 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4749?: CVE-2011-4749 affects Parallels Parallels Plesk Panel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-4749?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-4749 published?: CVE-2011-4749 was published on 2011-12-16 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:parallels:parallels_plesk_panel:10.3.1_build1013110726.09:*:*:*:*:*:*:*

More vulnerabilities in Parallels Parallels Plesk Panel

CVE-2011-4744 — Critical (CVSS 10.0): The Control Panel in Parallels Plesk Panel 10.2.0 build 20110407.20 sends incorrect Content-Type headers for certain…
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CVE-2011-4733 — Critical (CVSS 10.0): The Server Administration Panel in Parallels Plesk Panel 10.2.0_build1011110331.18 sends incorrect Content-Type headers…
CVE-2011-4732 — Critical (CVSS 10.0): The Server Administration Panel in Parallels Plesk Panel 10.2.0_build1011110331.18 omits the Content-Type header's…
CVE-2011-4730 — Critical (CVSS 10.0): The Server Administration Panel in Parallels Plesk Panel 10.2.0_build1011110331.18 generates a password form field…

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