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CVE-2015-3226

14
FAUCET Score

CVE-2015-3226 is a cross-site scripting (XSS) vulnerability in the json/encoding.rb component of Active Support in Ruby on Rails versions 3.x, 4.1.x before 4.1.11, and 4.2.x before 4.2.2. This flaw allows remote attackers to inject arbitrary web script or HTML by crafting a malicious Hash that is improperly handled during JSON encoding. The vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and a potential impact of partial integrity compromise, but no confidentiality or availability impact. While there are no known public exploits or Metasploit modules, the vulnerability has garnered some community discussion and media coverage, suggesting awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
3.0.0CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:3.0.0:*:*:*:*:*:*:*
3.1.0CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:3.1.0:*:*:*:*:*:*:*
3.2.0CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:3.2.0:*:*:*:*:*:*:*
3.2.1CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:3.2.1:*:*:*:*:*:*:*
3.2.2CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:3.2.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.78%
Probability of exploitation in next 30 days
EPSS Percentile
84.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0278 is in the 77th percentile among its peer group of 19,958 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

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 (7)

rubygemspatch availablevia ghsa
Product: activesupportFixed in: 4.1.11
rubygemspatch availablevia ghsa
Product: activesupportFixed in: 4.2.2
redhatend of lifevia redhat_api
Product: CloudForms Management Engine 5Fixed in: ruby193-rubygem-activesupport
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-ror41-rubygem-activesupport
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: ruby193-rubygem-activesupport
redhatend of lifevia redhat_api
Product: Red Hat Subscription Asset ManagerFixed in: ruby193-rubygem-activesupport
redhatend of lifevia redhat_api
Product: Red Hat Subscription Asset ManagerFixed in: rubygem-activesupport

Vendor Advisories (2)

rubygemsGHSA-vxvp-4xwc-jpp6medium

activesupport Cross-site Scripting vulnerability

Oct 24, 2017
redhatCVE-2015-3226Moderate

rubygem-activesupport: XSS Vulnerability in ActiveSupport::JSON.encode

Jun 16, 2015

References

openwall.com / lists/oss-security/2015/06/16/17
groups.google.com / forum/message/raw
Vendor Advisory
debian.org / security/2016/dsa-3464
securityfocus.com / bid/75231
securitytracker.com / id/1033755