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CVE-2013-6416: XSS Vulnerability in simple_format helper

December 6, 2013 (updated August 8, 2019)

The simple_format helper converts user supplied text into html text which is intended to be safe for display. A change made to the implementation of this helper means that any user provided HTML attributes will not be escaped correctly. As a result of this error, applications which pass user-controlled data to be included as html attributes will be vulnerable to an XSS attack.

References

  • seclists.org/oss-sec/2013/q4/404

Code Behaviors & Features

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Affected versions

All versions starting from 4.0.0 before 4.0.2

Fixed versions

  • 4.0.2

Solution

Upgrade to latest or escape user-controlled data passed as HTML attributes like: simple_format(some_text, class: h(params[:class]))

Impact 4.3 MEDIUM

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

Learn more about CVSS

Weakness

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Source file

gem/actionpack/CVE-2013-6416.yml

Spotted a mistake? Edit the file on GitLab.

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