Apache · Struts 1
CVE-2017-9791
Apache Struts 1 Improper Input Validation Vulnerability
Exploited in attacks
Critical 9.8 Attack chance: 99%
What it is
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: 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.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: August 10, 2022
- Added to the CISA list
- February 10, 2022
- Published
- July 10, 2017
- Severity
- Critical 9.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 99% in the top 0.1% of all known vulnerabilities
- Weakness
- CWE-20
- More details
- NVD · CVE.org · CISA
All references (7)
- http://www.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.html
- http://www.securityfocus.com/bid/99484
- https://www.exploit-db.com/exploits/42324/
- http://struts.apache.org/docs/s2-048.html
- http://www.securitytracker.com/id/1038838
- https://www.exploit-db.com/exploits/44643/
- https://security.netapp.com/advisory/ntap-20180706-0002/
More exploited flaws from Apache
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Jan 21, 2022 | ActionForm Denial-of-Service | Struts 1 | High 7.5 | 55% |
| Oct 8, 2026 | Command Injection | Struts | High 8.1 | 97% |
| Aug 4, 2026 | Missing Encryption of Sensitive Data | Tomcat | High 7.5 | 99% |
| Apr 16, 2026 | Improper Input Validation | ActiveMQ | High 8.8 | 98% |
| May 1, 2025 | Improper Escaping of Output | HTTP Server | Critical 9.1 | >99.9% |
| Apr 1, 2025 | Path Equivalence | Tomcat | Critical 10.0 | 99.9% |
| Feb 4, 2025 | Forced Browsing | OFBiz | Critical 9.8 | >99.9% |
| Sep 18, 2024 | Improper Access Control | HugeGraph-Server | Critical 9.8 | 99.2% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.