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Servers and applications

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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 10 Feb 2022.

Severity
Critical 9.8
Published
10 Jul 2017
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
99% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Over the network · No login needed · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Sources
NVD

Affected software

SoftwareAffected versions
Apache StrutsServers and applications · cpe:a:apache:struts
  • Version 2.3.32
  • Version 2.3.31
  • Version 2.3.30
  • Version 2.3.29
All 33 release lines
  • Version 2.3.1
  • Version 2.3.1.1
  • Version 2.3.1.2
  • Version 2.3.3
  • Version 2.3.4
  • Version 2.3.4.1
  • Version 2.3.7
  • Version 2.3.8
  • Version 2.3.12
  • Version 2.3.14
  • Version 2.3.14.1
  • Version 2.3.14.2
  • Version 2.3.14.3
  • Version 2.3.15
  • Version 2.3.15.1
  • Version 2.3.15.2
  • Version 2.3.15.3
  • Version 2.3.16
  • Version 2.3.16.1
  • Version 2.3.16.2
  • Version 2.3.16.3
  • Version 2.3.20
  • Version 2.3.20.1
  • Version 2.3.20.3
  • Version 2.3.24
  • Version 2.3.24.1
  • Version 2.3.24.3
  • Version 2.3.28
  • Version 2.3.28.1
  • Version 2.3.29
  • Version 2.3.30
  • Version 2.3.31
  • Version 2.3.32

Known exploited

CISA name
Apache Struts 1 Improper Input Validation Vulnerability
Required action
Apply updates per vendor instructions.
Due for US agencies
10 Aug 2022
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-9791
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-9791