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CVE-2011-2931

16
FAUCET Score

CVE-2011-2931 describes a cross-site scripting (XSS) vulnerability in the strip_tags helper within Ruby on Rails versions prior to 2.3.13, 3.0.10, and 3.1.0.rc5. This flaw allows remote attackers to inject arbitrary web script or HTML by providing a tag with an invalid name. With a CVSS score of 4.3, this vulnerability has a medium attack complexity and could lead to information disclosure or defacement, but not impact availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.0CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:2.0.0:*:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:2.0.0:rc1:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:2.0.0:rc2:*:*:*:*:*:*
2.0.1CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:2.0.1:*:*:*:*:*:*:*
2.0.2CPE matchmatch criteria
cpe:2.3:a:rubyonrails:rails:2.0.2:*:*:*:*:*:*:*

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
2.49%
Probability of exploitation in next 30 days
EPSS Percentile
83.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0249 is in the 73rd percentile among its peer group of 19,956 CVEs.

Social Chatter

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 (4)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch
rubygemspatch availablevia ghsa
Product: actionpackFixed in: 2.3.13
rubygemspatch availablevia ghsa
Product: actionpackFixed in: 3.0.10

Vendor Advisories (1)

rubygemsGHSA-v5jg-558j-q67cmedium

actionpack Cross-site Scripting vulnerability

Oct 24, 2017

References

groups.google.com / group/rubyonrails-security/msg/fd41ab62966e0fd1
Patch
lists.fedoraproject.org / pipermail/package-announce/2011-September/065109.html
lists.fedoraproject.org / pipermail/package-announce/2011-September/065137.html
lists.fedoraproject.org / pipermail/package-announce/2011-September/065212.html
bugzilla.redhat.com / show_bug.cgi
Patch
secunia.com / advisories/45921
github.com / rails/rails/commit/586a944ddd4d03e66dea1093306147594748037a
Patch
weblog.rubyonrails.org / 2011/8/16/ann-rails-3-1-0-rc6
Patch
debian.org / security/2011/dsa-2301
openwall.com / lists/oss-security/2011/08/17/1
Patch
openwall.com / lists/oss-security/2011/08/19/11
Patch
openwall.com / lists/oss-security/2011/08/20/1
Patch
openwall.com / lists/oss-security/2011/08/22/13
Patch
openwall.com / lists/oss-security/2011/08/22/14
openwall.com / lists/oss-security/2011/08/22/5
Patch