CVE-2017-9791
KEVApache Struts 1 Improper Input Validation Vulnerability
Description
The Struts 1 plugin in Apache Struts might allow remote code execution via a malicious field value passed in a raw message to the ActionMessage.
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HPublishedJul 10, 2017
Last modifiedJun 17, 2026
Added to KEVFeb 10, 2022
Remediation dueAug 10, 2022
References
- struts.apache.org/docs/s2-048.htmlMitigationVendor Advisory
- oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.htmlPatchThird Party Advisory
- securityfocus.com/bid/99484Broken LinkThird Party Advisory
- securitytracker.com/id/1038838Broken LinkThird Party Advisory
- security.netapp.com/advisory/ntap-20180706-0002/Third Party Advisory
- exploit-db.com/exploits/42324/Third Party AdvisoryVDB Entry
- exploit-db.com/exploits/44643/Third Party AdvisoryVDB Entry
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-9791US Government Resource
0 recent articles mention this CVE
89
Risk assessment · Critical
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1539 days
- CVSS
- 9.8 CRITICAL
- EPSS (30-day exploit probability)
- 98.9% · top 1% of all CVEs
- Weakness
- CWE-20
- Attack vector
- Network, remotely reachable
- Preconditions
- No privileges and no user interaction
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.