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HTML sanitization

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HTML sanitization is the process of examining an HTML document and producing a new HTML document that preserves only whatever tags are designated "safe". HTML sanitization can be used to protect against cross-site scripting attacks by sanitizing any HTML code submitted by a user.

Tags often allowed are <b>, <i>, <u>, <em>, and <strong>.

In PHP this can be performed using the strip_tags() or htmlspecialchars() functions.[1][2]

In Java this can be achieved by using OWASP Java HTML Sanitizer Project [3]

References

  1. ^ http://www.php.net/strip_tags
  2. ^ http://php.net/manual/en/function.htmlspecialchars.php
  3. ^ https://www.owasp.org/index.php/OWASP_Java_HTML_Sanitizer_Project


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