CVE-2017-9805
KEVApache Struts Deserialization of Untrusted Data Vulnerability
Description
Apache Struts REST Plugin 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.
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.
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HPublishedSep 15, 2017
Last modifiedJun 17, 2026
Added to KEVNov 3, 2021
Remediation dueMay 3, 2022
References
- oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.htmlPatchThird Party Advisory
- securityfocus.com/bid/100609Broken LinkThird Party Advisory
- securitytracker.com/id/1039263Broken LinkThird Party Advisory
- blogs.apache.org/foundation/entry/apache-struts-statement-on-equifaxVendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=1488482Issue TrackingThird Party Advisory
- cwiki.apache.org/confluence/display/WW/S2-052MitigationVendor Advisory
- lgtm.com/blog/apache_struts_CVE-2017-9805Broken Link
- security.netapp.com/advisory/ntap-20170907-0001/Third Party Advisory
- struts.apache.org/docs/s2-052.htmlMitigationVendor Advisory
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170907-struts2Third Party Advisory
- exploit-db.com/exploits/42627/ExploitThird Party Advisory
- kb.cert.org/vuls/id/112992Third Party AdvisoryUS Government Resource
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Risk assessment · Critical
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1637 days
- CVSS
- 8.1 HIGH
- EPSS (30-day exploit probability)
- 99.4% · top 1% of all CVEs
- Weakness
- CWE-502
- 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.