Is CVE-2012-0391 in the CISA KEV catalog?

Yes. CVE-2012-0391 is on the CISA Known Exploited Vulnerabilities list, added 2022-01-21.

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

CVE-2012-0391 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2012-0391?

CVE-2012-0391 has an EPSS score of 75.07% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2012-0391

CRITICALCISA KEVEPSS 99th pctl

9.8

CVSS v3

NVD

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.

CWE-94Code Injection

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

75.07%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

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.

Apply updates per vendor instructions.

Remediation due: 2022-07-21

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-22.