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CVE-2012-0391: Apache Struts 2 Improper Input Validation Vulnerability

criticalknown exploitedpublic exploitCVE-2012-0391
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
The ExceptionDelegator component in Apache Struts 2 before 2.2.3.1 contains an improper input validation vulnerability that allows for remote code execution.

CSIRTS triage

vendor: Apacheproduct: Struts 2SQL injectionaffected: before 2.2.3.1
What
The ExceptionDelegator component in Apache Struts 2 before 2.2.3.1 contains an improper input validation vulnerability that allows for remote code execution.
Who is affected
Deployments of Apache Struts 2 versions before 2.2.3.1.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Upgrade to Apache Struts 2 version 2.2.3.1 or later.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-01-21
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2012-0391

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2012-0391coverage & exploitation statusNVD · CVE.org

Recent advisories for Apache Struts

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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