CVE-2026-77929 — ClipBucket < 5.5.3-#182 Remote Code Execution via Photo Upload Endpoint
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 ma…
Published: 2026-09-18 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7