# CVE-2017-9791: Apache Struts 1 Improper Input Validation Vulnerability

> CVE-2017-9791: Apache Struts 1 Improper Input Validation Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2017-9791
Last updated: 2025-10-21T23:55:38Z

- Published: 2017-07-10 16:00 UTC · Updated: 2025-10-21 23:55 UTC · Assigner: apache
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 98.9%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-02-10, federal due date 2022-08-10, ransomware use: Unknown

## Description

The Struts 1 plugin in Apache Struts 2.1.x and 2.3.x might allow remote code execution via a malicious field value passed in a raw message to the ActionMessage.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Apache Software Foundation: Apache Struts

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2017-9791)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2017-9791)
- [https://security.netapp.com/advisory/ntap-20180706-0002/](https://security.netapp.com/advisory/ntap-20180706-0002/)
- [http://struts.apache.org/docs/s2-048.html](http://struts.apache.org/docs/s2-048.html)
- [https://www.exploit-db.com/exploits/42324/](https://www.exploit-db.com/exploits/42324/)
- [https://www.exploit-db.com/exploits/44643/](https://www.exploit-db.com/exploits/44643/)
- [http://www.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.html](http://www.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.html)
- [http://www.securityfocus.com/bid/99484](http://www.securityfocus.com/bid/99484)
- [http://www.securitytracker.com/id/1038838](http://www.securitytracker.com/id/1038838)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2017-9791 · Markdown: https://rewindex.com/cve/CVE-2017-9791.md · JSON: https://rewindex.com/api/v1/cves/CVE-2017-9791 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:44:55.651Z