CVE-2026-77929: Macwarrior Clipbucket-v5

High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days.

ClipBucket v5 before 5.5.3-#182 contains a file upload vulnerability that allows authenticated users to achieve remote code execution by uploading a PHP file with valid image magic bytes through the photo upload endpoint. The FileUpload::manageFile() function in fileupload.class.php fails to update the file extension after MIME validation, allowing an attacker-controlled .php extension to persist on disk and execute as PHP via PHP-FPM when the uploaded file is retrieved.

Affected products

• Macwarrior Clipbucket-v5

Published 2026-09-18. Last modified 2026-09-22.