Some vulnerabilities have been reported in Vanilla, which can be exploited by malicious users to conduct script insertion attacks, and by malicious people to conduct cross-site scripting and cross-site request forgery attacks.
1) Input passed to the "NewPassword" parameter in people.php (when "PostBackAction" is set to "Apply") 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.
2) Input passed to the "Account picture", "Icon", and "Value" (under "Add custom information") form fields in account.php is not properly sanitised before being stored. This can be exploited to insert arbitrary HTML attributes, which are 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 attacker has valid user credentials and that the victim has valid administrator credentials.
3) A vulnerability in ajax/UpdateCheck.php is caused due to the application allowing users to perform certain actions via HTTP requests without performing any validity checks to verify the request. No further information is currently available.
4) A vulnerability in the sign-out functionality is caused due to the application allowing users to perform certain actions via HTTP requests without performing any validity checks to verify the request. No further information is currently available.
The vulnerabilities are reported in version 1.1.4. Other versions may also be affected.
Solution: All vulnerabilities except for the "Value" form field in #2 are fixed in version 1.1.5-rc1.
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Subject: Vanilla Multiple Vulnerabilities
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