[jbossseam-issues] [JBoss JIRA] Updated: (JBSEAM-2204) Potential XSS issue in seam text with allowed href attribute

[Christian Bauer (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBSEAM-2204?page=all ]

Christian Bauer updated JBSEAM-2204:
------------------------------------

    Priority: Critical  (was: Major)

This is indeed a critical issue, both the href and the style attribute are vulnerable to attribute-based cross site scripting attacks. 

I didn't  know that you can execute expression() in CSS, this is another horrible IE extension. So that means that the style attribute can no longer be allowed by Seam Text. 

http://jeremiahgrossman.blogspot.com/2007/07/attribute-based-cross-site-scripting.html

Alternative solution: Escape HTML attribute values.


> Potential XSS issue in seam text with allowed href attribute
> ------------------------------------------------------------
>
>                 Key: JBSEAM-2204
>                 URL: http://jira.jboss.com/jira/browse/JBSEAM-2204
>             Project: JBoss Seam
>          Issue Type: Bug
>          Components: Wiki
>    Affects Versions: 2.0.0.GA
>            Reporter: Christian Bauer
>         Assigned To: Christian Bauer
>            Priority: Critical
>
> We allow <a href="foo"/> in Seam Text, which can potentially be abused to inject Javascript executed in the context of the page. Need to evaluate impact of leaving or removing.

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