WordPress RSVPMaker v2.5.4 Persistent XSS

# Exploit Title: WordPress RSVPMaker v2.5.4 Persistent XSS
# Date: 8/12/12
# Exploit Author: Chris Kellum
# Vendor Homepage: http://rsvpmaker.com/
# Software Link: http://downloads.wordpress.org/plugin/rsvpmaker.zip
# Version: 2.5.4



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Vulnerability Details
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The RSVP form does not properly sanitize input fields, allowing for XSS.

     Example:

          <script>alert(/xss/)</script>

Plugin appears to escape apostrophes and quotes, but this can easily be circumvented.

XSS will fire when the admin views the event's attendance list in the RSVP report section.

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Disclosure Timeline
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8/4/12 - Vulnerability discovered.
8/4/12 - Vendor notified.
8/10/12 - Version 2.5.5 released.
8/12/12 - Public disclosure.