Is CVE-2012-0391 actively exploited?

Yes. CVE-2012-0391 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2012-0391 be exploited remotely?

The attack vector of CVE-2012-0391 has not been classified yet.

What is the CVSS score of CVE-2012-0391?

CVE-2012-0391 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2012-0391

HIGHCISA KEVIN THE WILD

CVE-2012-0391

Published: January 21, 2022

EPSS:88.32%probability of exploitation in 30 daysPercentile:99.5th

Official Description

The ExceptionDelegator component in Apache Struts 2 before 2.2.3.1 contains an improper input validation vulnerability that allows for remote code execution.

NVD Source

CISA KEV Advisory

Apache Struts 2 Improper Input Validation Vulnerability

The ExceptionDelegator component in Apache Struts 2 before 2.2.3.1 contains an improper input validation vulnerability that allows for remote code execution.

Added to KEV: 2022-01-21Federal patch deadline: 2022-07-21

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

The ExceptionDelegator component in Apache Struts 2 before version 2.2.3.1 contains an improper input validation vulnerability that allows for remote code execution. This high-severity flaw, with an EPSS score of 0.88319 and confirmed exploitation in the wild, can lead to complete compromise of affected web applications.

This vulnerability has been actively exploited in the wild and is listed in CISA's KEV catalog. The improper input validation allows for remote code execution, making it remotely exploitable.

Recommended Action

Upgrade Apache Struts 2 to version 2.2.3.1 or later. Implement web application firewalls (WAFs) to help detect and block malicious input, and ensure proper input validation is in place.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2012-0391 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2012-0391 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.