Vulnerability · CVE-2012-0391
Apache Struts 2 Improper Input Validation Vulnerability
Published Jan 8, 2012 · catalog updated Jun 16, 2026 · Apache Struts 2
Patch now
CVE-2012-0391 is in the CISA known-exploited catalog, due Jul 21, 2022. Confirm Apache Struts 2 against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- Severity
- Critical9.8
- Known exploitation
- CISA KEV and VulnCheck KEV
- EPSS
- 75.60%
- Remediation
- Remediation guidance
- Affected products
- cpe apache/struts · vendor Apache Struts 2 · vendor n/a n/a
The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter values as OGNL expressions during certain exception handling for mismatched data types of properties, which allows remote attackers to execute arbitrary Java code via a crafted parameter.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe apache/strutsversion unspecified
- vendor Apache Struts 2version unspecified
- vendor n/a n/aversion unspecified
How to fix CVE-2012-0391
Recommended remediation
Apply updates per vendor instructions. CISA due date Jul 21, 2022.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2012-0391 is in the CISA known-exploited catalog, due Jul 21, 2022. Confirm Apache Struts 2 against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Which versions are affected?
Affected version ranges are not on this record. Apply updates per vendor instructions.
What should an analyst verify?
CWE-20: Improper Input Validation; CWE-94: Code Injection. EPSS 75.60%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Jan 8, 2012 · Catalog
Detected
The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter values as OGNL expressions during certain exception handling for mismatched data types of properties, which allows remote attackers to execute arbitrary Java code via a crafted parameter.
Jan 21, 2022 · CISA KEV
Known exploited
Apply updates per vendor instructions.
Jul 21, 2022 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter values as OGNL expressions during certain exception handling for mismatched data types of properties, which allows remote attackers to execute arbitrary Java code via a crafted parameter.
Sources
- CISA KEVConfirmed exploitationCVE-2012-0391
The ExceptionDelegator component in Apache Struts 2 before 2.2.3.1 contains an improper input validation vulnerability that allows for remote code execution.
cisa.gov - CVE.orgVulnerability recordCVE-2012-0391
The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter values as OGNL expressions during certain exception handling for mismatched data types of properties, which allows remote attackers to execute arbitrary Java code via a crafted parameter.
cve.org - FIRST EPSSExploitation probabilityCVE-2012-0391
30-day exploitation probability 75.6%
first.org - Exploit DatabasePublic exploit reference18329
Public archive entry. The exploit body is not stored here.
exploit-db.com - Exploit DatabasePublic exploit reference18984
Public archive entry. The exploit body is not stored here.
exploit-db.com - Metasploit ModulesPublic exploit moduleexploit_multi/http/struts_code_exec_exception_delegator
Public module reference (excellent). Module source is not copied into this catalog.
rapid7.com - NIST NVDVulnerability recordCVE-2012-0391
The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter values as OGNL expressions during certain exception handling for mismatched data types of properties, which allows remote attackers to execute arbitrary Java code via a crafted parameter.
nvd.nist.gov - VulnCheck KEVConfirmed exploitationCVE-2012-0391
The ExceptionDelegator component in Apache Struts 2 before 2.2.3.1 contains an improper input validation vulnerability that allows for remote code execution.
vulncheck.com
References
- 20120105 SEC Consult SA-20120104-0 :: Multiple critical vulnerabilities in Apach · archives.neohapsis.com
- Vendor Advisory · secunia.com
- Vendor Advisory · struts.apache.org
- Vendor Advisory · struts.apache.org
- 18329 · exploit-db.com
- Vendor Advisory · issues.apache.org
- CISA note · nvd.nist.gov
- VulnCheck exploitation evidence · cisa.gov
- VulnCheck exploitation evidence · fortiguard.com
- Reference · sec-consult.com
Freshness
Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.