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Servers and applications

CVE-2016-4465

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.

Severity
Medium 5.3
Published
4 Jul 2016
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
10% in the next 30 daysHigher than 95% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Over the network · No login needed · No user action needed
Attacker can
Slow it down
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Sources
NVD

Affected software

SoftwareAffected versions
Apache StrutsServers and applications · cpe:a:apache:struts
  • Version 2.5
  • Version 2.5-beta3
  • Version 2.5-beta2
  • Version 2.5-beta1
All 12 release lines
  • Version 2.3.20
  • Version 2.3.20.1
  • Version 2.3.20.3
  • Version 2.3.24
  • Version 2.3.24.1
  • Version 2.3.24.3
  • Version 2.3.28
  • Version 2.3.28.1
  • Version 2.5-beta1
  • Version 2.5-beta2
  • Version 2.5-beta3
  • Version 2.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-4465
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-4465