How severe is CVE-2017-9805?

CVE-2017-9805 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-9805 being actively exploited?

Yes. CVE-2017-9805 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2017-9805?

CVE-2017-9805 primarily affects Apache Struts. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-9805?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2017-9805 have an EU (EUVD) identifier?

Yes. CVE-2017-9805 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-0602. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2017-9805 published?

CVE-2017-9805 was published on 2017-09-15 and last updated on 2026-06-17.

CVE-2017-9805

CVE-2017-9805 is a high-severity vulnerability in Apache Struts with a CVSS 3.x base score of 8.1. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03). The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 99% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
EU (EUVD) id: EUVD-2018-0602
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
Weakness: CWE-502
Affected product: Apache Struts
Published: 2017-09-15
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2017-9805?: CVE-2017-9805 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-9805 being actively exploited?: Yes. CVE-2017-9805 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2017-9805?: CVE-2017-9805 primarily affects Apache Struts. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-9805?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2017-9805 have an EU (EUVD) identifier?: Yes. CVE-2017-9805 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-0602. It is also flagged as exploited in the EUVD (since 2021-11-03).
When was CVE-2017-9805 published?: CVE-2017-9805 was published on 2017-09-15 and last updated on 2026-06-17.

References

Affected products (11)

cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:digital_media_manager:-:*:*:*:*:*:*:*
cpe:2.3:a:cisco:hosted_collaboration_solution:10.5\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:hosted_collaboration_solution:11.0\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:hosted_collaboration_solution:11.5\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:hosted_collaboration_solution:11.6\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:media_experience_engine:3.5:*:*:*:*:*:*:*
cpe:2.3:a:cisco:media_experience_engine:3.5.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:network_performance_analysis:-:*:*:*:*:*:*:*
cpe:2.3:a:cisco:video_distribution_suite_for_internet_streaming:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_balance:-:*:*:*:*:*:*:*

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