CVE-2016-4465

5.3 MEDIUM 10% exploit odds Fix listed Denial of service Web app

What it is

The URLValidator class in Apache Struts 2 2.3.20 through 2.3.28.1 and 2.5.x before 2.5.1 allows remote attackers to cause a denial of service via a null value for a URL field.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 10.4% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2016-07-04 22:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 00:47 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 10.4% in the next 30 days (EPSS).
Severity: 5.3 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2016-07-04 22:59 UTC
Last modified: 2026-06-17 00:47 UTC
Exploit probability: 10.4% · EPSS, next 30 days
Weakness: CWE-20 · Improper input validation
Record status: Modified

Affected

Apache Struts 2.3.20
Apache Struts 2.3.20.1
Apache Struts 2.3.20.3
Apache Struts 2.3.24
Apache Struts 2.3.24.1
Apache Struts 2.3.24.3
Apache Struts 2.3.28
Apache Struts 2.3.28.1

Attack profile CVSS 3.0 · 5.3

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: Low

Raw vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record