Pleasanter provided fails to properly verify passwords in LDAP authentication when processing specially crafted requests under certain configurations. If exploited, an attacker may bypass LDAP authentication by providing only a valid Login ID, without a password. As a result, an attacker may view, alter or delete information stored in the product with the privilege of the account used to log in.

Pleasanter contains a stored cross-site scripting vulnerability in Preview for Attachments, which allows an attacker to execute an arbitrary script in a logged-in user's web browser.