CVE-2017-9791
Apache Struts 1 Improper Input Validation Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 10 August 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 98.91% probability · 100th percentile
- Public exploits
- 2 in Exploit-DB · verified · first 7 July 2017
- CISA KEV
- Listed 10 February 2022 · due 10 August 2022
- Weakness
- CWE-20
- Affected
- apache/struts
- Source
- security@apache.org
EPSS 98.9% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2017-9791
Public exploits (2)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.