How severe is CVE-2011-4909?

CVE-2011-4909 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2011-4909 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4909?

CVE-2011-4909 primarily affects Joomla Joomla!. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4909?

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

When was CVE-2011-4909 published?

CVE-2011-4909 was published on 2012-10-07 and last updated on 2026-06-16.

CVE-2011-4909

CVE-2011-4909 is a medium-severity vulnerability in Joomla Joomla! 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: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Joomla Joomla!
Published: 2012-10-07
Last modified: 2026-06-16

Description

Multiple cross-site scripting (XSS) vulnerabilities in Joomla! before 1.5.12 allow remote attackers to inject arbitrary web script or HTML via the HTTP_REFERER header to (1) components/com_content/views/article/tmpl/form.php, (2) components/com_user/controller.php, (3) plugins/system/legacy/html.php, or (4) templates/beez/html/com_content/article/form.php.

Frequently asked questions

What is CVE-2011-4909?: Multiple cross-site scripting (XSS) vulnerabilities in Joomla! before 1.5.12 allow remote attackers to inject arbitrary web script or HTML via the HTTP_REFERER header to (1) components/com_content/views/article/tmpl/form.php, (2) components/com_user/controller.php, (3) plugins/system/legacy/html.php, or (4) templates/beez/html/com_content/article/form.php.
How severe is CVE-2011-4909?: CVE-2011-4909 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-4909 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4909?: CVE-2011-4909 primarily affects Joomla Joomla!. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4909?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4909 published?: CVE-2011-4909 was published on 2012-10-07 and last updated on 2026-06-16.

References

Affected products (12)

cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.2:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.3:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.4:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.5:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.6:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.7:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.8:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.9:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.10:*:*:*:*:*:*:*

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