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Fencer Vulns
high 8.1

CVE-2017-9805 kev in the critical feed json

REST Plugin in Apache Struts uses an XStreamHandler with an instance of XStream for deserialization without any type filtering

published 2017-09-15 9 y ago modified 2026-06-17 4 mo ago also GHSA-gg9m-fj3v-r58c , EUVD-2018-0602

cvss
8.1
version 3.1, CNA
cisa kev
Exploited
added 2021-11-03
epss
99.4%
EPSS 99.4% chance of exploitation in 30 days, percentile 99.9%
public exploits
2
Metasploit, Exploit-DB, plus a Nuclei check

Summary

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.

Patch / fix

cisa required action Apply updates per vendor instructions.

  • maven org.apache.struts:struts2-rest-plugin 2.3.34, 2.5.13
  • apache struts 2.3.34, 2.5.13

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-9805 updated cvss 8.1

struts: RCE attack via REST plugin with XStream handler to deserialise XML requests

  • Red Hat Enterprise Linux 5 struts Red Hat JBoss Data Virtualization 6 struts struts Red Hat JBoss Fuse Service Works 6 struts struts Red Hat JBoss Operations Network 3 struts struts Red Hat Satellite 5 struts
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (Metasploit exploit/multi/http/struts2_rest_xstream)
  2. Published
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
5 y ago
Patch by
2022-05-03 (4 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Apache, Struts
CISA name
Apache Struts Deserialization of Untrusted Data Vulnerability

ATT&CK techniques

How it is exploited and what it leads to, in MITRE ATT&CK terms.

  • T1190 Exploit Public-Facing Application exploitation
  • T1059 Command and Scripting Interpreter primary impact

kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
21 mo ago

Exploit prediction

99.40% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H

Affected packages

ecosystem package affected fixed in
maven org.apache.struts:struts2-rest-plugin
>=2.1.1, <2.3.34
>=2.5.0, <2.5.13
2.3.34
2.5.13

Affected products

  • Apache Software Foundation Apache Struts

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.