Apache Struts Improper Input Validation Vulnerability
n/a — n/a
Apache Struts 2.0.0 through 2.3.15 allows remote attackers to execute arbitrary OGNL expressions via a parameter with a crafted (1) action:, (2) redirect:, or (3) redirectAction: prefix.
9.8
100.0%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- Jul 18, 2013
- Modified
- Oct 22, 2025
- Added to KEV
- Mar 25, 2022
- Federal patch due
- Apr 15, 2022
CISA required action
Apply updates per vendor instructions.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
1 foundWeaponization
Public repositories whose name or description references CVE-2013-2251, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit — cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
References
Frequently asked questions
What is CVE-2013-2251?
Apache Struts 2.0.0 through 2.3.15 allows remote attackers to execute arbitrary OGNL expressions via a parameter with a crafted (1) action:, (2) redirect:, or (3) redirectAction: prefix.
How severe is CVE-2013-2251?
CVE-2013-2251 has a CVSS base score of 9.8 out of 10 (CVSS 3.1).
Is CVE-2013-2251 actively exploited in the wild?
Yes. CVE-2013-2251 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Mar 25, 2022, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2013-2251?
100.0% - meaning FIRST.org's EPSS model estimates a 100.0% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2013-2251?
Yes - a public Nuclei template referencing CVE-2013-2251 exist in public repositories we checked. We also found 1 public GitHub repositories referencing this CVE.
What type of vulnerability is CVE-2013-2251?
CVE-2013-2251 is classified under CWE-74 (CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')).
Cross-checked against
Impactr finds and proves whether CVE-2013-2251 — or flaws like it — are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.