CVE-2017-9805
Apache Struts Deserialization of Untrusted Data Vulnerability
- High 8.1
- Exploited: added to CISA KEV 3 Nov 2021
- A public exploit reference is listed
Description
The REST Plugin in Apache Struts 2.1.1 through 2.3.x before 2.3.34 and 2.5.x before 2.5.13 uses an XStreamHandler with an instance of XStream for deserialization without any type filtering, which can lead to Remote Code Execution when deserializing XML payloads.
Key facts
- Published
- 15 Sep 2017
- Last changed
- 21 Oct 2025
- Assigned by
- apache
- KEV added
- 3 Nov 2021
- KEV fix due
- 3 May 2022
- EPSS
- 99.396% likely to be exploited in the next 30 days, higher than 99.941% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 8.1CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Struts |
|
Timeline
- 15 Sep 2017 Published
- 3 Nov 2021 CVE-2017-9805 added to CISA KEV
- 3 Nov 2021 Added to the CISA KEV catalogue