CVE-2012-4431

CVE-2012-4431 is a medium-severity vulnerability in Apache Tomcat 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-264.

Key facts

• Severity: Medium (CVSS 2.0 base score 4.3)
• EPSS exploit prediction: 9% (95th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-264
• Affected product: Apache Tomcat
• Published: 2012-12-19
• Last modified: 2026-06-16

Description

org/apache/catalina/filters/CsrfPreventionFilter.java in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.32 allows remote attackers to bypass the cross-site request forgery (CSRF) protection mechanism via a request that lacks a session identifier.

Frequently asked questions

What is CVE-2012-4431?

org/apache/catalina/filters/CsrfPreventionFilter.java in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.32 allows remote attackers to bypass the cross-site request forgery (CSRF) protection mechanism via a request that lacks a session identifier.

How severe is CVE-2012-4431?

CVE-2012-4431 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2012-4431 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-4431?

CVE-2012-4431 primarily affects Apache Tomcat. In total, 72 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-4431?

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

When was CVE-2012-4431 published?

CVE-2012-4431 was published on 2012-12-19 and last updated on 2026-06-16.

References

• http://archives.neohapsis.com/archives/bugtraq/2012-12/0045.html
• http://lists.opensuse.org/opensuse-updates/2012-12/msg00089.html
• http://lists.opensuse.org/opensuse-updates/2012-12/msg00090.html
• http://lists.opensuse.org/opensuse-updates/2013-01/msg00037.html
• http://lists.opensuse.org/opensuse-updates/2013-01/msg00051.html
• http://lists.opensuse.org/opensuse-updates/2013-01/msg00080.html
• http://marc.info/?l=bugtraq&m=136612293908376&w=2
• http://marc.info/?l=bugtraq&m=139344343412337&w=2
• http://rhn.redhat.com/errata/RHSA-2013-0267.html
• http://rhn.redhat.com/errata/RHSA-2013-0268.html
• http://rhn.redhat.com/errata/RHSA-2013-0647.html
• http://rhn.redhat.com/errata/RHSA-2013-0648.html
• http://rhn.redhat.com/errata/RHSA-2013-1437.html
• http://rhn.redhat.com/errata/RHSA-2013-1853.html
• http://secunia.com/advisories/57126
• http://svn.apache.org/viewvc/tomcat/tc7.0.x/trunk/java/org/apache/catalina/filters/CsrfPreventionFilter.java?r1=1393088&r2=1393087&pathrev=1393088
• http://svn.apache.org/viewvc/tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml?r1=1393088&r2=1393087&pathrev=1393088
• http://svn.apache.org/viewvc?view=revision&revision=1393088
• http://tomcat.apache.org/security-6.html
• http://tomcat.apache.org/security-7.html
• http://www.securityfocus.com/bid/56814
• http://www.securitytracker.com/id?1027834
• http://www.ubuntu.com/usn/USN-1685-1
• https://h20566.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c03748878
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18541

Affected products (72)

• cpe:2.3:a:apache:tomcat:6.0:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.0:alpha:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.1:alpha:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.2:alpha:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.2:beta:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.4:alpha:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.6:alpha:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.7:alpha:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.7:beta:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.8:alpha:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.9:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.9:beta:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.10:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.11:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.12:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.13:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.14:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.15:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.16:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.17:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.18:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.19:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.20:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.24:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.26:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.27:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.28:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.29:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.30:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.31:*:*:*:*:*:*:*
• cpe:2.3:a:apache:tomcat:6.0.32:*:*:*:*:*:*:*

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