CVE-2017-9791

Name: CVE-2017-9791
Creator: NVD / NIST
Published: 2017-07-10T16:29:00.277+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 98.93%

Last modified Jun 17, 2026

CVE-2017-9791 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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 has confirmed active exploitation in the wild. EPSS estimates a 98.93% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

98.93%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Aug 10, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apache	Struts	2.3.1
Apache	Struts	2.3.1.1
Apache	Struts	2.3.1.2
Apache	Struts	2.3.3
Apache	Struts	2.3.4
Apache	Struts	2.3.4.1
Apache	Struts	2.3.7
Apache	Struts	2.3.8
Apache	Struts	2.3.12
Apache	Struts	2.3.14
Apache	Struts	2.3.14.1
Apache	Struts	2.3.14.2
Apache	Struts	2.3.14.3
Apache	Struts	2.3.15
Apache	Struts	2.3.15.1
Apache	Struts	2.3.15.2
Apache	Struts	2.3.15.3
Apache	Struts	2.3.16
Apache	Struts	2.3.16.1
Apache	Struts	2.3.16.2
Apache	Struts	2.3.16.3
Apache	Struts	2.3.20
Apache	Struts	2.3.20.1
Apache	Struts	2.3.20.3
Apache	Struts	2.3.24
Apache	Struts	2.3.24.1
Apache	Struts	2.3.24.3
Apache	Struts	2.3.28
Apache	Struts	2.3.28.1
Apache	Struts	2.3.29
Apache	Struts	2.3.30
Apache	Struts	2.3.31
Apache	Struts	2.3.32

References

http://struts.apache.org/docs/s2-048.htmlMitigation, Vendor Advisory
http://www.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.htmlPatch, Third Party Advisory
http://www.securityfocus.com/bid/99484Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038838Broken Link, Third Party Advisory, VDB Entry
https://security.netapp.com/advisory/ntap-20180706-0002/Third Party Advisory
https://www.exploit-db.com/exploits/42324/Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/44643/Third Party Advisory, VDB Entry
http://struts.apache.org/docs/s2-048.htmlMitigation, Vendor Advisory
http://www.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.htmlPatch, Third Party Advisory
http://www.securityfocus.com/bid/99484Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038838Broken Link, Third Party Advisory, VDB Entry
https://security.netapp.com/advisory/ntap-20180706-0002/Third Party Advisory
https://www.exploit-db.com/exploits/42324/Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/44643/Third Party Advisory, VDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-9791US Government Resource

Timeline

Published: Jul 10, 2017
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2017-9791?

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.

How severe is CVE-2017-9791?

CVE-2017-9791 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 98.93% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2017-9791?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-9791?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST