CVE-2012-0391

Apache — Apache Struts 2 Improper Input Validation Vulnerability

Apache · CWE-94 — Code injection · in CISA KEV since 2022-01-21

KEV since 2022 · listed over a yearCISA KEVActively Exploited

EVRS 81 of 100 Urgent

Patch This Cycle

Rank 574 of 2,960 tracked

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Why it scores 81

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.756.

CISA KEVApplied
RansomwareDid not apply
Vendor exploitationDid not apply
EPSSApplied
Microsoft Exploitability IndexNot applicable
Pre-patch disclosureNo data
KEV recencyDid not apply
CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

nvd.nist.gov/…/CVE-2012-0391

Fixed in

org.apache.struts:struts2-core2.2.3.1
org.apache.struts.xwork:xwork-core2.2.3.1

Affected versions

org.apache.struts:struts2-core (maven)affected < 2.2.3.1, fixed in 2.2.3.1
org.apache.struts.xwork:xwork-core (maven)affected < 2.2.3.1, fixed in 2.2.3.1

Remediation

Apply updates per vendor instructions.

Fixed versions from NVD and GitHub. Affected packages also in GitHub Advisory GHSA-4wrr-9h5r-m92w (CC BY 4.0).

Evidence

Each value with its source

Measure	Value	Source
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is.	9.8	NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs.	0.756 (99.52nd pctl)	FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild.	Confirmed	CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it.	Unknown or none	CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it.	2022-07-21 · KEV since 2022 · listed over a year	CISA KEV
Public exploit moduleA module existing is not the same as active exploitation.	Public module exists	Metasploit
EUVD cross-referenceENISA's record: CVSS 9.8 (v3.1), assigned by mitre.	Listed	ENISA EUVD

Description

NVD

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.

What CISA says to do

nvd.nist.gov/…/CVE-2012-0391

Public module

Metasploit lists a public excellent-rank module for this CVE: Apache Struts Remote Command Execution (multi/http/struts_code_exec_exception_delegator). A module existing is not the same as active exploitation; see metasploit.com.