Public Vulnerability Reports

Tikiwiki tiki-editpage Arbitrary File Exposure Vulnerability



Tikiwiki Community Portal is a full featured, freely available,
Wiki/CMS/Groupware system written in PHP. More information is available


Remote exploitation of an input validation vulnerability in Tikiwiki
allows attackers to gain access to arbitrary files on the vulnerable
system under the privileges of the underlying web-server.

The problem specifically exists in the following snippet of code from

    $sdta = @file_get_contents($suck_url);
        $htmlparser = new HtmlParser($sdta, $grammar, '', 0);

No sanity checking is done on the 'suck_url' parameter prior to
utilizing it as the path to a file to read and parse. By specifying a
path with directory traversal modifiers an attacker can request an
arbitrary file to load and render on the screen.


Successful exploitation allows unauthenticated remote attackers to
access arbitrary files on the vulnerable system with the privileges of
the underlying web-server. If external database access is allowed, then
exploitation can result in a full database compromise as the database
credentials are easily exposed through this vulnerability.


iDEFENSE has confirmed the existence of this issue in Tikiwiki versions
1.8.4 and 1.8.5. It is suspected that earlier versions are vulnerable as


Restrict unnecessary access to Tikiwiki with firewall filters or HTTP
based authentication. If remote database connectivity is not required,
configure the underlying database server to bind to localhost only or
firewall the listening port to accept trusted hosts only.


This vulnerability has been addressed in Tikiwiki 1.9.1 which is
available for download at:


The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CAN-2005-1925 to this issue. This is a candidate for inclusion in
the CVE list (, which standardizes names for
security problems.


06/07/2005   Initial vendor notification
08/21/2005   Initial vendor response
11/10/2005   Public disclosure

CREDIT is credited with this discovery.

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Copyright © 2005 Verisign, Inc.

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