CVE-2026-53992: ProjectSend

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

ProjectSend r2029 contains a reflected cross-site scripting vulnerability in thumbnails-regenerate.php that allows remote attackers to inject arbitrary HTML and JavaScript by supplying unsanitized values in the start_date and end_date GET parameters, which are echoed unescaped into HTML attribute values. Attackers can craft a malicious URL that, when followed by an authenticated victim with edit_settings permissions, executes injected scripts in the application origin to steal session cookies or perform unauthorized actions including user management, file management, and application settings changes.

Affected products

• ProjectSend ProjectSend: up to and including b4ad95b

Published 2026-08-05. Last modified 2026-09-24.