Phproject before 1.8.7 contains a missing object-level authorization vulnerability in the REST API issue endpoints (singleget, singlecomments, singlecommentspost) that allows authenticated API key holders to bypass the security.restrictaccess confidentiality control by never invoking the allowAccess() authorization routine. Attackers can use a valid API key to read restricted issue contents and comments, including owner and author email addresses, and post unauthorized comments to issues they should not have access to.

Phproject is a high performance full-featured project management system. From 1.8.0 to before 1.8.3, a Stored Cross-Site Scripting (XSS) vulnerability exists in the Planned Hours field when creating a new project. When sending a POST request to /issues/new/, the value provided in the Planned Hours field is included in the server response without any HTML encoding or sanitization. Because of this, an attacker can craft a malicious payload such as <script>alert(1)</script> and include it in the plannedhours parameter. The server reflects the input directly in the HTML of the project creation page, causing the browser to interpret and execute it. This vulnerability is fixed in 1.8.3.

In Phproject before version 1.7.8, there's a vulnerability which allows users with access to file uploads to execute arbitrary code. This is patched in version 1.7.8.