Some vulnerabilities have been discovered in Wikipad, which can be exploited by malicious users to manipulate certain data and by malicious people to disclose potentially sensitive information and to conduct cross-site scripting and cross-site request forgery attacks.

1) Input passed to the "id" parameter in pages.php is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

2) Input passed to the "id" parameter in pages.php (when "action" is set to "edit") is not properly verified before being used to access files. This can be exploited to view and modify files with a "*.txt" extension through directory traversal attacks.

Successful exploitation to modify files requires editing rights.

3) The application allows users to perform certain actions via HTTP requests without performing proper validity checks to verify the requests. This can be exploited to e.g. manipulate certain data when a logged-in user with editing rights visits a specially crafted web page.

The vulnerabilities are confirmed in version 1.6. Other versions may also be affected.

Solution
Edit the source code to ensure that input is properly sanitised and verified. Do not browse untrusted web sites or follow untrusted links while being logged-in to the application.

Provided and/or discovered by
High-Tech Bridge SA

Original Advisory
HTB22826:
http://www.htbridge.ch/advisory/multiple_xss_vulnerabilities_in_wikipad.html

HTB22827:
http://www.htbridge.ch/advisory/file_content_disclosure_in_wikipad.html

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