CVE intelligence and bounded remediation

CVE-2017-9805 — Apache Struts Deserialization of Untrusted Data Vulnerability

High CVSS 8.1 CISA KEV

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.

Severity
High
CVSS
8.1 (3.1)
Published
2017-09-15
CISA KEV
Known exploited
Ecosystem
software/application
Weaknesses
CWE-502

Affected products

  • apache / struts
  • cisco / digital_media_manager
  • cisco / hosted_collaboration_solution / 10.5(1)
  • cisco / hosted_collaboration_solution / 11.0(1)
  • cisco / hosted_collaboration_solution / 11.5(1)
  • cisco / hosted_collaboration_solution / 11.6(1)

Showing 6 representative product identities from 12 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Unsafe deserialization and object reconstruction

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Check exposure

  • Inventory serialization formats accepted from requests, queues, caches, files, cookies, and cross-service messages.
  • Trace whether untrusted input can select classes, types, callbacks, constructors, or object hooks during decoding.
  • Identify signing, schema validation, trust-boundary, and compatibility settings for each decoder.

Remediate safely

  • Replace native object deserialization with a data-only format and explicit schema validation.
  • If replacement is not immediate, use a safe decoder with a minimal type allowlist and disable polymorphic or executable hooks.
  • Update the affected library and add inert tests for unknown types, extra fields, malformed nesting, and unsigned data.

Authoritative sources

Complete CVE record and remediation plan

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