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Date: 7 Jan 2006 20:49:24 -0000 From: alex@...ln.com To: bugtraq@...urityfocus.com Subject: [eVuln] NavBoard BBcode XSS Vulnerability New eVuln Advisory: NavBoard BBcode XSS Vulnerability --------------------Summary---------------- Vendor: NavBoard Vendor's Web Site: http://navarone.f2o.org/ Software: NavBoard Sowtware's Web Site: http://sourceforge.net/projects/navboard/ Versions: checked: V16 Stable(2.6.0) and V17beta2 Critical Level: Moderate Type: Cross-Site Scripting Class: Remote Status: Unpatched Exploit: Available Solution: Available Discovered by: Aliaksandr Hartsuyeu (eVuln.com) Published: 2006.01.07 eVuln ID: EV0019 -----------------Description-------------- Arbitrary script code insertion is possible in BBcode. Vulnerable Script: post.php BBcode isn't properly sanitized. This can be used to post arbitrary script code which will be executed in the browser of every visitor. Administrator's cookie-based authentication is threatened. Login and plain text Password are stored in Cookies. Administrator can modify PHP Code from Administrator's panel. --------------Exploit--------------------- BBcode Examples: For V16(2.6.0) [b]<XSS>[/b] [textlarge]<XSS>[/textlarge] For V16(2.6.0) and V17beta2 [url=javascript:alert(123)]title[/url] --------------Solution--------------------- No vendor-provided patch availabve. Solution: disable BBcode --------------Credit--------------------- Original Advisory: http://evuln.com/vulns/19/summary.html Discovered by: Aliaksandr Hartsuyeu (eVuln.com)