Known exploited vulnerability

CVE-2017-9791

Apache Struts 1 Improper Input Validation Vulnerability

Past due Added Federal deadline

What is affected

Vendor Apache
Product Struts 1
Weakness CWE-20

The vulnerability

The Struts 1 plugin in Apache Struts might allow remote code execution via a malicious field value passed in a raw message to the ActionMessage.

Required action

Apply updates per vendor instructions.

US federal civilian agencies were required to act by 10 August 2022 under BOD 22-01. The deadline is a compliance date, not a measure of severity — it says nothing about how dangerous the flaw is to anyone else.

Where this comes from

Every field on this page is taken from the CISA Known Exploited Vulnerabilities catalog, last synced 11 Nov 2026, 21:30. Nothing here is our own assessment. For the technical scoring, see the NVD record below.

NVD record ↗ CVE.org record ↗

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