Multiple Cross-Site Scripting (XSS) vulnerability was identified on the WordPress plugin Gravity Forms before 2.1.15 in the nggallery-manage-gallery page.
Securin Zero-Days
CVE-2015-9229 – Reflected Cross-Site Scripting in NextGEN Gallery
Severity:Medium
Vendor
Imagely
Affected Product
NextGEN Gallery
CVE
CVE-2015-9229
Securin ID
2015-CSW-09-1004
Status
Fixed
Date
February 17, 2015
Description
Proof of Concept (POC):
Visit the following page on a site with this plugin installed.
http://yourwordpresssite.com/wordpress/wp-admin/admin.php?page=nggallery-manage-gallery&mode=edit&gid=1&paged=1 and modify the value of images[1][alttext] and path variable in NextGEN Gallery Photocrati Version 2.1.10 with โ)โ></script><script>alert(document.cookie);</script> payload and save it to view further. Now, the added XSS payload is executed whenever the user reviews it.
Note: XSS payload wasย tried with the application once after implementing Unfiltered Html Settings as defined to the wp-config.php file.
Define (‘DISALLOW_UNFILTERED_HTML’, true);
POST request parameter images[1][alttext] variable in the given URL http://localhost/wordpress/wpadmin/admin.php?page=nggallerymanagegallery&mode=edit&gid=1&paged=1 of NextGEN Gallery Plugin version 2.1.10 is vulnerable to Cross-Site Scripting (XSS).
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Figure 01: [alttext]variable in the given URL http://localhost/wordpress/wp-admin/admin.php?page=nggallery-manage-gallery&mode=edit&gid=1&paged=1
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Figure 02:ย XSS Payload gets executed in the browser whenever the user views it.
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Figure 03: XSS Payload injected to pathvariable in the given URL http://localhost/wordpress/wp-admin/admin.php?page=nggallery-manage-gallery&mode=edit&gid=3&paged=1
Figure 04: XSS Payload gets executed in the browser whenever the user views it.
Impact
An XSS vulnerability allows an attacker to inject malicious code into the applications via the images [1] [alttext] parameter.
Remediations
Download the latest updated version of the Nextgen plugin and apply the patch as per vendor advisory.
Timeline
Feb 17, 2015: Discovered in NextGen Gallery 2.1.7 version.
Feb 17, 2015: Reported to WordPress.
Feb 18, 2015: The vendor acknowledged the issue.
Sep 04, 2015: Same vulnerability once again discovered in NextGen Gallery 2.1.10 version.
Sep 09, 2015: Same vulnerability exists in NextGen Gallery 2.1.15 version.
Sep 14, 2015: Reported multiple XSS on version 2.1.15 directly to the Photocrati vendor and reminded the developer.