How severe is CVE-2011-2891?

CVE-2011-2891 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-2891 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2891?

CVE-2011-2891 primarily affects Joomla Joomla!. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2891?

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

When was CVE-2011-2891 published?

CVE-2011-2891 was published on 2011-07-27 and last updated on 2026-06-16.

CVE-2011-2891

CVE-2011-2891 is a medium-severity vulnerability in Joomla Joomla! 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. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Joomla Joomla!
Published: 2011-07-27
Last modified: 2026-06-16

Description

Joomla! 1.6.x before 1.6.2 allows remote attackers to obtain sensitive information via an empty Itemid array parameter to index.php, which reveals the installation path in an error message, a different vulnerability than CVE-2011-2488.

Frequently asked questions

What is CVE-2011-2891?: Joomla! 1.6.x before 1.6.2 allows remote attackers to obtain sensitive information via an empty Itemid array parameter to index.php, which reveals the installation path in an error message, a different vulnerability than CVE-2011-2488.
How severe is CVE-2011-2891?: CVE-2011-2891 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-2891 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2891?: CVE-2011-2891 primarily affects Joomla Joomla!. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2891?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-2891 published?: CVE-2011-2891 was published on 2011-07-27 and last updated on 2026-06-16.

References

Affected products (20)

cpe:2.3:a:joomla:joomla\!:1.6:alpha:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:alpha2:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta1:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta10:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta11:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta12:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta13:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta14:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta15:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta2:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta3:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta4:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta5:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta6:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta7:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta8:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:beta9:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6:rc1:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6.0:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.6.1:*:*:*:*:*:*:*

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