New answers tagged html
Within the attribute value (double-quoted) state only the literal double quote " character (U+0022) allows a proper exit from that state. This is also backed up by the results of fuzzing of characters syntactically equivalent to double quote in HTML attributes. So if your mitigation technique removes any of those literal characters, you are safe from any ...
The two main risks of a system such as this are: SQL Injection XSS The risk of SQL Injection is mitigated by the use of parameterised queries. This ensures that data values inserted into the database can only be interpreted as data and not by part of the query by an attacker escaping out of the context. XSS is prevented by correct output escaping. This ...
Set <form> accept-charset Attribute using UTF-8 Sanitize all the html / xml special characters and replace them with their escaped version. Display the code within the <pre> tags
You escape the output by replacing "special" characters with their HTML character entities. In PHP, you can do this using htmlspecialchars(), for example. I suggest using the ENT_QUOTES flag to ensure all types of quotes get encoded.
How about sending the information the the local server and then using a back-end technology (PHP?) to send it to the 3rd party server? Your browser is preventing this as a security measure (AJAX Call to a 3rd party server)
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