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Insecure Library Loading
Moderately critical

My Little Forum/Guestbook/Weblog "link" BBcode Script Insertion

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Release Date:  2006-01-27    Last Update:  2006-02-03    Views:  14,817

Secunia Advisory SA18628

Where:

From remote

Impact:

Cross Site Scripting

Solution Status:

Unpatched

CVE Reference(s):

Description


Aliaksandr Hartsuyeu has discovered a vulnerability in My Little Forum, My Little Guestbook, and My Little Weblog, which can be exploited by malicious people to conduct script insertion attacks.

Input passed to the "link" bbcode tag when posting a message isn't properly verified, before being used. This can be exploited to inject arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when a malicious link with the "JavaScript" URI handler is followed from a malicious message.

Example:
[link=javascript:[code]]Text[/link]

The vulnerability has been confirmed in the following products:
* My Little Forum 1.5
* My Little Guestbook (latest version)
* My Little Weblog (latest version)

Other versions may also be affected.


Solution:
Edit the source code to ensure that input is properly verified.

Provided and/or discovered by:
Aliaksandr Hartsuyeu

Original Advisory:
http://evuln.com/vulns/51/summary.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: My Little Forum/Guestbook/Weblog "link" BBcode Script Insertion

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