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CVE-2016-8738

17
FAUCET Score

CVE-2016-8738 affects Apache Struts versions 2.5 through 2.5.5, allowing an attacker to craft a malicious URL that, when validated by the built-in URLValidator, can overload the server process. This vulnerability has a medium severity CVSS score of 5.9, indicating a network-based attack with high impact on availability and high attack complexity. There is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, suggesting low public awareness.

Impacted Technologies

VendorProductVersion(s)CPE
2.5CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.5:*:*:*:*:*:*:*
2.5.1CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.5.1:*:*:*:*:*:*:*
2.5.2CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.5.2:*:*:*:*:*:*:*
2.5.3CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.5.3:*:*:*:*:*:*:*
2.5.4CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.5.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.23%
Probability of exploitation in next 30 days
EPSS Percentile
86.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0323 is in the 81st percentile among its peer group of 19,955 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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 (1)

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

Vendor Advisories (1)

mavenGHSA-86vq-8qhc-5rqwmedium

Apache Struts vulnerable to possible DoS attack when using URLValidator

May 14, 2022

References

security.netapp.com / advisory/ntap-20180629-0003
struts.apache.org / docs/s2-044.html
MitigationPatchVendor Advisory
securityfocus.com / bid/94657
Third Party AdvisoryVDB Entry