Exploited CVEs / Apache / CVE-2013-2251
CVE-2013-2251
Apache Struts Improper Input Validation Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2022-04-15 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Actively exploited Apache Struts vulnerability, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2022-03-25.
Risk summary
Updated July 28, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2013-2251
Apache Struts evaluates attacker-supplied OGNL expressions in this flaw, giving unauthenticated remote code execution with a 100% EPSS score: automated exploitation continues daily across the internet. Struts hides inside countless Java web applications and vendor products, so admins often do not know they run it. Critical Severity (CVSS 9.8) plus invisibility is a dangerous combination.
Do this: Audit Java web applications and appliances for embedded Struts libraries and upgrade any pre-2.3.15.1 versions.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2013-2251
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2013-2251
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2022-04-15 (past due).
Apply updates per vendor instructions.
Official fix for CVE-2013-2251
Check the vendor's security advisory channel for the patched Struts versions and workarounds.
Common questions about CVE-2013-2251
Is CVE-2013-2251 actively exploited?
Yes. CVE-2013-2251 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2022-03-25, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 100%.
What is the CISA deadline and required action for CVE-2013-2251?
CISA set the federal (BOD 22-01) remediation due date at 2022-04-15, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.
What fixes CVE-2013-2251?
Check the vendor's security advisory for the patched Struts versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2013-2251?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2013-2251's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
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Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
