The Easy Social Feed – Social Photos Gallery – Post Feed – Like Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'efb_likebox' shortcode in all versions up to, and including, 6.5.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Easy Social Feed – Social Photos Gallery – Post Feed – Like Box plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 6.5.4. This is due to missing or incorrect nonce validation on the save_groups_list function. This makes it possible for unauthenticated attackers to disconnect a site's facebook or instagram page/group connection via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The Easy Social Feed – Social Photos Gallery – Post Feed – Like Box plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 6.5.4. This is due to missing or incorrect nonce validation on the esf_insta_save_access_token and efbl_save_facebook_access_token functions. This makes it possible for unauthenticated attackers to connect their facebook and instagram pages to the site via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The Easy Social Feed plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on multiple AJAX functions in all versions up to, and including, 6.5.2. This makes it possible for authenticated attackers, with subscriber-level access and above, to perform unauthorized actions, such as modifying the plugin's Facebook and Instagram access tokens and updating group IDs.

The Easy Social Feed WordPress plugin before 6.4.0 does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admin.

The Easy Social Feed Free and Pro WordPress plugins before 6.2.7 do not sanitise some of their parameters used via AJAX actions before outputting them back in the response, leading to Reflected Cross-Site Scripting issues