Is CVE-2017-9805 actively exploited?

Yes. CVE-2017-9805 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2017-9805 be exploited remotely?

The attack vector of CVE-2017-9805 has not been classified yet.

What is the CVSS score of CVE-2017-9805?

CVE-2017-9805 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2017-9805

HIGHCISA KEVIN THE WILD

CVE-2017-9805

Published: November 3, 2021

EPSS:94.32%probability of exploitation in 30 daysPercentile:99.9th

Official 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.

NVD Source

CISA KEV Advisory

Apache Struts Deserialization of Untrusted Data Vulnerability

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.

Added to KEV: 2021-11-03Federal patch deadline: 2022-05-03

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This vulnerability in Apache Struts REST Plugin allows for remote code execution due to insecure deserialization of XML payloads. The very high EPSS score of 0.94322 indicates a significant likelihood of exploitation, making this an urgent issue for affected deployments.

This vulnerability has been actively exploited in the wild and is listed in CISA's KEV catalog. Its remote exploitability makes it a prime target for attackers.

Recommended Action

Update Apache Struts REST Plugin to a version that properly filters types during deserialization. Implement network-level filtering to block malicious XML payloads.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2017-9805 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2017-9805 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.