CVE-2013-2251VulnerabilityPublished 03/25/2022Updated 10/24/2026

CVE-2013-2251: Apache Struts Improper Input Validation Vulnerability

Affects Apache StrutsSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 03/25/2022
KEV deadline: 04/15/2022
EPSS: 100.0% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2013-2251 (opens in a new tab)

Description

CVE-2013-2251 is a high-severity vulnerability in Apache Struts that allows remote attackers to execute arbitrary Object-Graph Navigation Language (OGNL) expressions due to improper input validation. This vulnerability has been exploited in the wild. No specific affected versions or patch information are provided in the available data.

Summary

Apache Struts contains an improper input validation vulnerability identified as CVE-2013-2251. This flaw permits remote attackers to execute arbitrary OGNL expressions, potentially leading to remote code execution. The vulnerability has been confirmed to be exploited in the wild. No vendor advisory or patch details are included in the provided information.

Impact

Successful exploitation of this vulnerability enables remote attackers to execute arbitrary OGNL expressions on affected Apache Struts installations, which can lead to remote code execution and full system compromise. The vulnerability is known to be actively exploited in the wild, increasing the risk to vulnerable systems.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until official fixes or mitigations are confirmed, users should monitor vendor communications and apply any recommended updates or workarounds promptly.

Weaknesses

CWE-20Improper Input Validation (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 10:55:59 UTC

Weaknesses

References

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