CVE-2011-2931

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-08-29 · updated 2026-06-16
Weakness: CWE-79

Description

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.

Affected products

Ruby on Rails: 2.0.0, 2.0.0-rc1, 2.0.0-rc2, 2.0.1, 2.0.2, 2.0.4 (+52)
rubyonrails Ruby On Rails: 3.0.4

References

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
http://secunia.com/advisories/45921
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

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