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MyBB editpost.php Cross-Site Request Forgery
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Secunia Advisory:
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SA20659
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Release Date:
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2006-06-29
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Last Update:
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2006-07-11
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Popularity:
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6,450 views
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Critical:
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Less critical
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Impact:
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Hijacking
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Where:
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From remote
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Solution Status:
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Partial Fix
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| Software: | MyBB (formerly MyBulletinBoard) 1.x
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| CVE reference: | CVE-2006-3420
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Description:
Bartek Ryniec has discovered a vulnerability in MyBB, which can be exploited by malicious people to conduct cross-site request forgery attacks.
The vulnerability is caused due to the application allowing forum posts to be deleted via HTTP GET requests without performing any validity checks to verify the request. This can be exploited by e.g. a non-privileged user to delete arbitrary forum post when a malicious post that contains a specially crafted [img] tag is viewed by the administrative user.
Example:
[img]http://[host]/editpost.php?action=deletepost&pid=[post_id]&delete=yes[/img]
The vulnerability has been confirmed in version 1.1.3 and 1.1.4. Other versions may also be affected.
Solution:
The vulnerability has been partially fixed in version 1.1.5 by only allowing POST requests when deleting forum posts.
Do not browse untrusted web sites while being logged in to MyBB.
Provided and/or discovered by:
Bartek Ryniec
Changelog:
2006-07-11: Added CVE reference.
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