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Padraic Brady's Blog:
CodeIgniter 2.0.2 Cross-Site Scripting (XSS) Fixes And Recommendations
May 10, 2011 @ 11:12:55

Padraic Brady has a new post looking at a cross-site scripting issue he came across when working with CodeIgniter 2.0.2 and some fixes and recommendations he has about correcting the situation.

EllisLabs' news release for CodeIgniter 2.0.2 makes mention of "a small vulnerability". This small vulnerability is mentioned no where else (not even the actual changelog for 2.0.2). In reality, I reported seven distinct vulnerabilities across two classes. These vulnerabilities might allow an attacker to inject arbitrary HTML, CSS or Javascript, i.e. Cross-Site Scripting (XSS) into an application's output.

He gives a list of four recommendations that CodeIgniter 2.0.2 users can take to creating (or updating) their applications including using HTMLPurifier when you need sanitization and ensuring that views and templates from third parties are clear of XSS issues.

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