Cross site scripting (XSS) in rss feed plugin of Serendipity 1.2



The Serendipity blog system contains a plugin to display the content of feeds in the sidebar (serendipity_plugin_remoterss). If an attacker can modify the RSS feed, it's possible to inject javascript code in the link part, because it's not correctly escaped.

Sample code

Sample feed injecting code:

<rss version="2.0">
<link>" onMouseOver="alert(1)</link></item></channel>

Serendipity developers have fixed this in svn and all further version, please update to 1.2.1 or above.

CVE Information

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-6205 to this issue. This is a candidate for inclusion in the CVE list (, which standardizes names for security problems.

Credits and copyright

This vulnerability was discovered by Hanno Boeck of webhosting. It's licensed under the creative commons attribution license.

Hanno Boeck, 2007-12-05,