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CVE-2016-3087

88
FAUCET Score

CVE-2016-3087 is a critical remote code execution vulnerability affecting Apache Struts versions 2.3.19 to 2.3.28 when Dynamic Method Invocation is enabled. Attackers can exploit this flaw via the REST Plugin using an exclamation mark operator. With a CVSS score of 9.8, this vulnerability allows unauthenticated remote attackers to achieve full compromise of confidentiality, integrity, and availability. While not on the CISA KEV catalog, exploit modules are publicly available in Metasploit and ExploitDB, and it has garnered significant community discussion, indicating a high potential for exploitation.

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:*:*:*:*:*:*:*
2.3.24CPE 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:*:*:*:*:*:*:*
2.3.28CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.3.28:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
80.53%
Probability of exploitation in next 30 days
EPSS Percentile
99.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
Metasploit: Apache Struts REST Plugin With Dynamic Method Invocation Remote Code Execution · Jun 1, 2016
ExploitDB: EDB-43382 · Jun 6, 2017
This CVE's current EPSS score of 0.8053 is in the 98th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

mavenpatch availablevia ghsa
Product: org.apache.struts:struts2-coreFixed in: 2.3.20.3
mavenpatch availablevia ghsa
Product: org.apache.struts:struts2-coreFixed in: 2.3.24.3
mavenpatch availablevia ghsa
Product: org.apache.struts:struts2-coreFixed in: 2.3.28.1

Vendor Advisories (2)

mavenGHSA-mmj6-cjj4-hpr5critical

Apache Struts vulnerable to arbitrary remote code execution due to improper input validation

May 14, 2022
redhatCVE-2016-3087Important

struts: Passing malicious expression can cause RCE when Dynamic Method Invocation is enabled and REST plugin is used

May 31, 2016

References

struts.apache.org / docs/s2-033.html
Vendor Advisory
exploit-db.com / exploits/39919
www-01.ibm.com / support/docview.wss
securityfocus.com / bid/90960
securitytracker.com / id/1036017