Multiple plugins for WordPress are vulnerable to Stored Cross-Site Scripting via the plugin's bundled FancyBox JavaScript library (versions 1.3.4 to 3.5.7) in various versions due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Missing Authorization vulnerability in Colorlib Simple Custom Post Order allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Simple Custom Post Order: from n/a through 2.5.7.

The FancyBox for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in versions 3.0.2 to 3.3.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

The Coming Soon & Maintenance Mode by Colorlib plugin for WordPress is vulnerable to Information Exposure in all versions up to, and including, 1.0.99 via the REST API. This makes it possible for unauthenticated attackers to obtain post and page contents via REST API thus bypassing maintenance mode protection provided by the plugin.

The Brilliance <= 1.2.7, Activello <= 1.4.0, and Newspaper X <= 1.3.1 themes for WordPress are vulnerable to Plugin Activation/Deactivation. This is due to the 'activello_activate_plugin' and 'activello_deactivate_plugin' functions in the 'inc/welcome-screen/class-activello-welcome.php' file missing capability and security checks/nonces. This makes it possible for unauthenticated attackers to activate and deactivate arbitrary plugins installed on a vulnerable site.

The following themes for WordPress are vulnerable to Function Injections in versions up to and including Shapely <= 1.2.7, NewsMag <= 2.4.1, Activello <= 1.4.0, Illdy <= 2.1.4, Allegiant <= 1.2.2, Newspaper X <= 1.3.1, Pixova Lite <= 2.0.5, Brilliance <= 1.2.7, MedZone Lite <= 1.2.4, Regina Lite <= 2.0.4, Transcend <= 1.1.8, Affluent <= 1.1.0, Bonkers <= 1.0.4, Antreas <= 1.0.2, Sparkling <= 2.4.8, and NatureMag Lite <= 1.0.4. This is due to epsilon_framework_ajax_action. This makes it possible for unauthenticated attackers to call functions and achieve remote code execution.

Auth. (subscriber+) Reflected Cross-Site Scripting (XSS) vulnerability in Silkalns Activello theme <= 1.4.4 versions.

Auth. (subscriber+) Reflected Cross-Site Scripting (XSS) vulnerability in Silkalns Activello theme <= 1.4.4 versions.

The Coming Soon & Maintenance Mode by Colorlib WordPress plugin before 1.0.99 does not sanitize and escape some settings, allowing high privilege users such as admin to perform Stored Cross-Site Scripting when unfiltered_html is disallowed (for example in multisite setup)

The FancyBox for WordPress plugin before 3.0.3 for WordPress does not properly restrict access, which allows remote attackers to conduct cross-site scripting (XSS) attacks via an mfbfw[*] parameter in an update action to wp-admin/admin-post.php, as demonstrated by the mfbfw[padding] parameter and exploited in the wild in February 2015.