CVE-2011-0401

CVE-2011-0401 is a medium-severity vulnerability in Matomo 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-264.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.0)
• EPSS exploit prediction: 2% (74th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-264
• Affected product: Matomo
• Published: 2011-01-10
• Last modified: 2026-06-16

Description

Piwik before 1.1 does not properly limit the number of files stored under tmp/sessions/, which might allow remote attackers to cause a denial of service (inode consumption) by establishing many sessions.

Frequently asked questions

What is CVE-2011-0401?

Piwik before 1.1 does not properly limit the number of files stored under tmp/sessions/, which might allow remote attackers to cause a denial of service (inode consumption) by establishing many sessions.

How severe is CVE-2011-0401?

CVE-2011-0401 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-0401 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0401?

CVE-2011-0401 primarily affects Matomo. In total, 67 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0401?

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

When was CVE-2011-0401 published?

CVE-2011-0401 was published on 2011-01-10 and last updated on 2026-06-16.

References

• http://dev.piwik.org/trac/ticket/1279#comment:13
• http://dev.piwik.org/trac/ticket/1910
• http://osvdb.org/70381
• http://piwik.org/blog/2011/01/piwik-1-1-2/
• http://www.securityfocus.com/bid/45787
• https://exchange.xforce.ibmcloud.com/vulnerabilities/64638

Affected products (67)

• cpe:2.3:a:matomo:matomo:*:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.1:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.1.5:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.1.6:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.1.7:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.1.9:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.1.10:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.3:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.4:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.5:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.6:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.7:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.8:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.9:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.10:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.11:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.12:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.13:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.14:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.16:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.17:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.18:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.19:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.20:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.22:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.23:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.24:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.25:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.26:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.27:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.28:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.29:*:*:*:*:*:*:*
• cpe:2.3:a:matomo:matomo:0.2.30:*:*:*:*:*:*:*

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