CVE-2012-0391
Critical 9.8 Exploited in the wild (KEV)
Confirmed active exploitation — CISA KEV catalog
- Name
- Apache Struts 2 Improper Input Validation Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
Description
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.
Metrics
- CVSS 3.1
-
9.8 (CRITICAL)
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 76% (percentile: 100) as of 1 November 2026
- CWE
- CWE-94
Affected products
apache: struts
References
- http://secunia.com/advisories/47393 Vendor Advisory
- http://struts.apache.org/2.x/docs/s2-008.html Vendor Advisory
- http://struts.apache.org/2.x/docs/version-notes-2311.html Vendor Advisory
- https://issues.apache.org/jira/browse/WW-3668 Vendor Advisory
- http://secunia.com/advisories/47393 Vendor Advisory
- http://struts.apache.org/2.x/docs/s2-008.html Vendor Advisory
- http://struts.apache.org/2.x/docs/version-notes-2311.html Vendor Advisory
- https://issues.apache.org/jira/browse/WW-3668 Vendor Advisory
- http://archives.neohapsis.com/archives/bugtraq/2012-01/0031.html Broken LinkExploit
- http://www.exploit-db.com/exploits/18329 Exploit