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Vulnerability details: VCID-knsd-pv15-tydx
Vulnerability ID VCID-knsd-pv15-tydx
Aliases CVE-2011-2931
GHSA-v5jg-558j-q67c
Summary Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Cross-site scripting (XSS) vulnerability in the strip_tags helper in actionpack/lib/action_controller/vendor/html-scanner/html/node.rb in Ruby on Rails before 2.3.13, 3.0.x before 3.0.10, and 3.1.x before 3.1.0.rc5 allows remote attackers to inject arbitrary web script or HTML via a tag with an invalid name.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
generic_textual MODERATE http://groups.google.com/group/rubyonrails-security/msg/fd41ab62966e0fd1?dmode=source&output=gplain
generic_textual MODERATE http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065109.html
generic_textual MODERATE http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065137.html
generic_textual MODERATE http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065212.html
epss 0.00813 https://api.first.org/data/v1/epss?cve=CVE-2011-2931
epss 0.00813 https://api.first.org/data/v1/epss?cve=CVE-2011-2931
epss 0.00813 https://api.first.org/data/v1/epss?cve=CVE-2011-2931
epss 0.00813 https://api.first.org/data/v1/epss?cve=CVE-2011-2931
epss 0.00813 https://api.first.org/data/v1/epss?cve=CVE-2011-2931
epss 0.00813 https://api.first.org/data/v1/epss?cve=CVE-2011-2931
epss 0.00813 https://api.first.org/data/v1/epss?cve=CVE-2011-2931
epss 0.00813 https://api.first.org/data/v1/epss?cve=CVE-2011-2931
epss 0.00813 https://api.first.org/data/v1/epss?cve=CVE-2011-2931
generic_textual MODERATE https://bugzilla.redhat.com/show_bug.cgi?id=731436
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-v5jg-558j-q67c
generic_textual MODERATE https://github.com/advisories/GHSA-v5jg-558j-q67c
generic_textual MODERATE https://github.com/rails/rails
generic_textual MODERATE https://github.com/rails/rails/commit/586a944ddd4d03e66dea1093306147594748037a
generic_textual MODERATE https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2011-2931.yml
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2011-2931
generic_textual MODERATE http://weblog.rubyonrails.org/2011/8/16/ann-rails-3-1-0-rc6
generic_textual MODERATE http://www.debian.org/security/2011/dsa-2301
generic_textual MODERATE http://www.openwall.com/lists/oss-security/2011/08/17/1
generic_textual MODERATE http://www.openwall.com/lists/oss-security/2011/08/19/11
generic_textual MODERATE http://www.openwall.com/lists/oss-security/2011/08/20/1
generic_textual MODERATE http://www.openwall.com/lists/oss-security/2011/08/22/13
generic_textual MODERATE http://www.openwall.com/lists/oss-security/2011/08/22/14
generic_textual MODERATE http://www.openwall.com/lists/oss-security/2011/08/22/5
Reference id Reference type URL
http://groups.google.com/group/rubyonrails-security/msg/fd41ab62966e0fd1?dmode=source&output=gplain
http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065109.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065137.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065212.html
https://api.first.org/data/v1/epss?cve=CVE-2011-2931
https://bugzilla.redhat.com/show_bug.cgi?id=731436
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2931
http://secunia.com/advisories/45921
https://github.com/rails/rails
https://github.com/rails/rails/commit/586a944ddd4d03e66dea1093306147594748037a
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2011-2931.yml
http://weblog.rubyonrails.org/2011/8/16/ann-rails-3-1-0-rc6
http://www.debian.org/security/2011/dsa-2301
http://www.openwall.com/lists/oss-security/2011/08/17/1
http://www.openwall.com/lists/oss-security/2011/08/19/11
http://www.openwall.com/lists/oss-security/2011/08/20/1
http://www.openwall.com/lists/oss-security/2011/08/22/13
http://www.openwall.com/lists/oss-security/2011/08/22/14
http://www.openwall.com/lists/oss-security/2011/08/22/5
CVE-2011-2931 https://nvd.nist.gov/vuln/detail/CVE-2011-2931
GHSA-v5jg-558j-q67c https://github.com/advisories/GHSA-v5jg-558j-q67c
GLSA-201412-28 https://security.gentoo.org/glsa/201412-28
No exploits are available.
Exploit Prediction Scoring System (EPSS)
Percentile 0.74208
EPSS Score 0.00813
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:47:25.517433+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/gem/actionpack/CVE-2011-2931.yml 38.0.0