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A new version (0.9.0.0 - Release Candidate 1) of the free Secunia PSI
has been released. The new version includes many new and advanced
features, which makes it even easier to stay patched.

Download and test it today:
https://psi.secunia.com/

Read more about this new version:
https://psi.secunia.com/?page=changelog

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TITLE:
WordPress DMSGuestbook Plugin Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA28759

VERIFY ADVISORY:
http://secunia.com/advisories/28759/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting, Manipulation of data, Exposure of system
information, Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
DMSGuestbook 1.x (plugin for WordPress)
http://secunia.com/product/17463/

DESCRIPTION:
NBBN has discovered some vulnerabilities in the DMSGuestbook plugin
for WordPress, which can be exploited by malicious users to disclose
sensitive information or to manipulate data, and by malicious people
to conduct cross-site scripting and script insertion attacks.

1) Input passed to the "file" and "folder" parameters in the
WordPress installation's wp-admin/admin.php script (when "page" is
set to "dmsguestbook") is not properly sanitised before being used.
This can be exploited to display or edit arbitrary files through
directory traversal attacks.

Successful exploitation of this vulnerability requires valid
administrator credentials.

2) Input passed to the "gbmsg" parameter is not properly sanitised
before being stored. This can be exploited to insert arbitrary HTML
and script code, which is executed in a user's browser session in
context of an affected site when the malicious data is viewed.

Successful exploitation of this vulnerability requires that the
target user has valid administrator credentials.

3) Input passed to the "gbname", "gbemail", "gburl", and "gbmsg"
parameters 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.

The vulnerabilities are confirmed in version 1.8.0 and reported in
version 1.7.0. Other versions may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
NBBN

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
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