I have a site developed in WordPress 3.5.1. I have updated the WordPress to latest version (4.3.1), but it's not showing the plugin updates. It's showing all plugins are up to date, but i have already checked for the latest version of all plugins and new versions are available. I have tried with changing the theme, but nothing happened. Any solution for this problem?
Normal operation should show updates as they are needed with the Update screen. Although it is possible for plugins and/or code in your functions.php file to disable update notices.
Checking with a 'twenty' theme, and looking at your plugins (perhaps even temporarily disabling them) should get you current.
(Old question without an answer. Probably should also keep WP up to date,if you haven't already.)