Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2016-4465

23
FAUCET Score

CVE-2016-4465 describes a denial-of-service vulnerability in the URLValidator class of Apache Struts 2 versions 2.3.20 through 2.3.28.1 and 2.5.x before 2.5.1. An unauthenticated remote attacker can trigger this by providing a null value for a URL field, leading to service disruption. Rated as Medium severity (CVSS 5.3), it requires no user interaction and has a low impact on availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.3.20CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.3.20:*:*:*:*:*:*:*
2.3.20.1CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.3.20.1:*:*:*:*:*:*:*
2.3.20.3CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.3.20.3:*:*:*:*:*:*:*
2.3.24CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.3.24:*:*:*:*:*:*:*
2.3.24.1CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.3.24.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
10.28%
Probability of exploitation in next 30 days
EPSS Percentile
95.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1028 is in the 94th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

mavenpatch availablevia ghsa
Product: org.apache.struts:struts2-coreFixed in: 2.3.29
mavenpatch availablevia ghsa
Product: org.apache.struts:struts2-coreFixed in: 2.5.13

Vendor Advisories (2)

mavenGHSA-xg75-68x3-7p3qmedium

Apache Struts vulnerable to possible DoS attack when using URLValidator

May 17, 2022
redhatCVE-2016-4465Low

struts: Possible DoS attack when using URLValidator

Jun 17, 2016

References

jvndb.jvn.jp / jvndb/JVNDB-2016-000114
VDB EntryVendor Advisory
jvn.jp / en/jp/JVN12352818/index.html
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
struts.apache.org / docs/s2-041.html
Vendor Advisory
www-01.ibm.com / support/docview.wss
Third Party Advisory
oracle.com / technetwork/security-advisory/cpujul2017-3236622.html
securityfocus.com / bid/91278