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Open Redirect Weakness in MBoard

Advisory ID:HTB23029
Vulnerable Versions:1.3 and probably prior
Tested Version:1.3
Advisory Publication:July 6, 2011 [without technical details]
Vendor Notification:July 6, 2011
Public Disclosure:July 27, 2011
Vulnerability Type:Open Redirect [CWE-601]
Risk Level:Medium
CVSSv2 Base Score:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Solution Status:Not Fixed
Discovered and Provided:High-Tech Bridge Security Research Lab

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered weakness in MBoard which could be exploited to perform phishing attacks.

1) Open redirect weakness in MBoard
The weakness exists due to insufficient validation of the input data in the "url" parameter in go.php when redirecting users to external websites. A remote attacker can perform phishing attacks against application`s users.
Exploitation example:

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Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.

[1] High-Tech Bridge Advisory HTB23029 - - Redirection Weakness in MBoard
[2] MBoard - MBoard is a very simple message board script, useful for web sites that don't need or want big, complex and often empty forums.
[3] Common Weakness Enumeration (CWE) - - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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