How severe is CVE-2011-4729?

CVE-2011-4729 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-4729 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4729?

CVE-2011-4729 affects Parallels Parallels Plesk Panel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-4729?

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

When was CVE-2011-4729 published?

CVE-2011-4729 was published on 2011-12-16 and last updated on 2026-06-16.

CVE-2011-4729

CVE-2011-4729 is a medium-severity vulnerability in Parallels Parallels Plesk Panel with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Parallels Parallels Plesk Panel
Published: 2011-12-16
Last modified: 2026-06-16

Description

The Server Administration Panel in Parallels Plesk Panel 10.2.0_build1011110331.18 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 login_up.php3 and certain other files.

Frequently asked questions

What is CVE-2011-4729?: The Server Administration Panel in Parallels Plesk Panel 10.2.0_build1011110331.18 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 login_up.php3 and certain other files.
How severe is CVE-2011-4729?: CVE-2011-4729 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-4729 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4729?: CVE-2011-4729 affects Parallels Parallels Plesk Panel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-4729?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4729 published?: CVE-2011-4729 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:10.2.0_build1011110331.18:*:*:*:*:*:*:*

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