CVE-2013-1855

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2013-03-19 · updated 2026-06-16
Weakness: CWE-79

Description

The sanitize_css method in lib/action_controller/vendor/html-scanner/html/sanitizer.rb in the Action Pack component in Ruby on Rails before 2.3.18, 3.0.x and 3.1.x before 3.1.12, and 3.2.x before 3.2.13 does not properly handle \n (newline) characters, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks via crafted Cascading Style Sheets (CSS) token sequences.

Affected products

Red Hat Enterprise Linux: 6.0
Ruby on Rails: 3.2.0, 3.2.0-rc1, 3.2.0-rc2, 3.2.1, 3.2.2, 3.2.2-rc1 (+143)
rubyonrails Ruby On Rails: through 2.3.17; 0.5.0, 0.5.5, 0.5.6, 0.5.7, 0.6.0, 0.6.5 (+6)

References

http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html
http://lists.apple.com/archives/security-announce/2013/Oct/msg00006.html
http://lists.opensuse.org/opensuse-updates/2013-04/msg00072.html
http://lists.opensuse.org/opensuse-updates/2013-04/msg00073.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00013.html
http://rhn.redhat.com/errata/RHSA-2013-0698.html
http://rhn.redhat.com/errata/RHSA-2014-1863.html
http://support.apple.com/kb/HT5784
http://weblog.rubyonrails.org/2013/3/18/SEC-ANN-Rails-3-2-13-3-1-12-and-2-3-18-have-been-released/
https://groups.google.com/group/rubyonrails-security/msg/8ed835a97cdd1afd?dmode=source&output=gplain
http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html
http://lists.apple.com/archives/security-announce/2013/Oct/msg00006.html

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