The Click to Chat for WhatsApp plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to, and including, 4.44 This is due to the greetingsdialog() function building the {url} template placeholder from a sanitizetextfield()-filtered $SERVER['REQUESTURI'] on archive pages and then passing the substituted greeting content to doshortcode() in the greetings-1 and greetings-2 templates, without stripping shortcode delimiters. Because wpkses() runs against maincontent BEFORE the {url} substitution, the attacker-controlled URL bytes reach doshortcode() unfiltered. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes registered by WordPress core, the active theme, or any other plugin (e.

The Click to Chat – HoliThemes plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 3.35. This makes it possible for authenticated attackers, with contributor access or above, to include and execute arbitrary files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where images and other “safe” file types can be uploaded and included.

The Click to Chat WordPress plugin before 3.18.1 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 admins.