How severe is CVE-2017-9791?

CVE-2017-9791 has a CVSS 3.1 base score of 9.8 (CRITICAL). EPSS estimates a 98.9% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

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

CISA Known Exploited Vulnerabilities

Apache Struts 1 Improper Input Validation Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2022-02-10

Remediation due

2022-08-10

Required action
Apply updates per vendor instructions.

CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2017-9791

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.

Severity

CVSS 3.1 · CISA9.8 CRITICAL

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

SSVC · CISA-ADP

Exploitationactive

Automatableyes

Technical impacttotal

Affected Products

Vendor	Product	Affected versions
Apache Software Foundation	Apache Struts	2.1.x series 2.3.x series

References

7 Links

Exploits & PoCs

Vulnerability databases

Other references

Record Details

Published

2017-07-10

Last updated

2025-10-21

Assigner (CNA)

apache

Credited to

More from Apache Software Foundation

CVE-2021-4422810

Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints

CVE-2017-56389.8

Apache Struts Remote Code Execution Vulnerability

CVE-2021-404389

mod_proxy SSRF

CVE-2021-417737.5

Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.