UpHeron
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Servers and applications

CVE-2017-9805

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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021.

Severity
High 8.1
Published
15 Sept 2017
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
2.3.34, 2.5.13
Exploit chance
99% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Deserialization of untrusted data (CWE-502)
Attack
Over the network · Only under certain conditions · No login needed · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Sources
NVD

Affected software

SoftwareAffected versions
Apache StrutsServers and applications · cpe:a:apache:struts
  • From 2.1.2 before 2.3.34
  • From 2.5.0 before 2.5.13

Known exploited

CISA name
Apache Struts Deserialization of Untrusted Data Vulnerability
Required action
Apply updates per vendor instructions.
Due for US agencies
3 May 2022
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-9805
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-9805