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

SECUNIA ADVISORY ID:
SA18628

VERIFY ADVISORY:
http://secunia.com/advisories/18628/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
My Little Forum 1.x
http://secunia.com/product/2669/
My Little Guestbook
http://secunia.com/product/7054/
My Little Weblog
http://secunia.com/product/7055/

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

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