Gjoko Krstic has discovered a vulnerability in the Search plugin for Hotaru CMS, which can be exploited by malicious people to conduct cross-site scripting attacks.
Input passed to the "search" parameter in index.php 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 vulnerability is confirmed in version 1.3. Other versions may also be affected.
Vulnerable Products
Vulnerable Software: Hotaru CMS Search Plugin 1.x
Solution
Edit the source code to ensure that input is properly sanitised.