The WP Last Modified Info plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.9.5. This is due to the plugin not validating a user's access to a post before modifying its metadata in the 'bulk_save' AJAX action. This makes it possible for authenticated attackers, with Author-level access and above, to update the last modified metadata and lock the modification date of arbitrary posts, including those created by Administrators via the 'post_ids' parameter.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Sayan Datta WP Last Modified Info wp-last-modified-info allows Stored XSS.This issue affects WP Last Modified Info: from n/a through <= 1.9.2.

Improper Control of Generation of Code ('Code Injection') vulnerability in Sayan Datta WP Last Modified Info wp-last-modified-info allows Remote Code Inclusion.This issue affects WP Last Modified Info: from n/a through <= 1.9.2.

The WP Last Modified Info plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘template’ attribute of the lmt-post-modified-info shortcode in all versions up to, and including, 1.9.0 due to insufficient input sanitization and output escaping. 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.