Multiple XSS Vulnerabilities in Paid Memberships Pro WordPress Plugin

High-Tech Bridge Security Research Lab discovered vulnerability in Paid Memberships Pro WordPress plugin, which can be exploited to perform Cross-Site Scripting (XSS) attacks against website administrators.

1. Cross-Site Scripting (XSS) in Paid Memberships Pro WordPress plugin: CVE-2015-5532

1.1 Input passed via “s” HTTP GET parameter to “/wp-admin/admin.php” (when “page” is set to “pmpro-membershiplevels”) is not properly sanitised before being returned to the user. A remote attacker can trick a logged-in administrator to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website.

The exploitation example below uses the “alert()” JavaScript function to display “ImmuniWeb” word:

http://[host]/wp-admin/admin.php?page=pmpro-membershiplevels&s=%22%3E%3Cscri pt%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E

1.2 Input passed via “edit” HTTP GET parameter to “/wp-admin/admin.php” (when “page” is set to “pmpro-membershiplevels”) is not properly sanitised before being returned to the user. A remote attacker can trick a logged-in administrator to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website.

The exploitation example below uses the “alert()” JavaScript function to display “ImmuniWeb” word:

http://[host]/wp-admin/admin.php?page=pmpro-membershiplevels&edit=%22%3E%3Cs cript%3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E

1.3 Input passed via “s” HTTP GET parameter to “/wp-admin/admin.php” (when “page” is set to “pmpro-memberslist”) is not properly sanitised before being returned to the user. A remote attacker can trick a logged-in administrator to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website.

The exploitation example below uses the “alert()” JavaScript function to display “ImmuniWeb” word:

http://[host]/wp-admin/admin.php?l&page=pmpro-memberslist&s=%22%3E%3Cscript% 3Ealert%28%27ImmuniWeb%27%29;%3C/script%3E

1.4 Input passed via “s” HTTP GET parameter to “/wp-admin/admin.php” (when “page” is set to “pmpro-orders”) is not properly sanitised before being returned to the user. A remote attacker can trick a logged-in administrator to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website.

The exploitation example below uses the “alert()” JavaScript function to display “ImmuniWeb” word:

http://[host]/wp-admin/admin.php?filter=all&start-month=1&start-day=1&start- year=2015&end-month=6&end-day=22&end-year=2015&predefined-date=This+Month&l= 1&status&page=pmpro-orders&s=%22%3E%3Cscript%3Ealert%28%27immuniweb%27%29;%3 C/script%3E