CVE-2026-25728: critical vulnerability in MacWarrior clipbucket-v5
ClipBucket v5 Affected by Remote Code Execution via Avatar/Background File Upload Race Condition
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 0.3%
ClipBucket v5 is an open source video sharing platform. Prior to 5.5.3 - #40, a Time-of-Check to Time-of-Use (TOCTOU) race condition vulnerability exists in ClipBucket's avatar and background image upload functionality. The application moves uploaded files to a web-accessible location before validating them, creating a window where an attacker can execute arbitrary PHP code before the file is deleted. The uploaded file was moved to a web-accessible path via move_uploaded_file(), then validated via ValidateImage(). If validation failed, the file was deleted via @unlink(). This vulnerability is fixed in 5.5.3 - #40.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
MacWarrior · clipbucket-v5Related CVEs — MacWarrior clipbucket-v5
In the same product, most dangerous first.
CVE-2026-21875CRITICALClipBucket v5 Vulnerable to Blind SQL Injection through Channel CommentsEPSS 1.8%CVE-2025-21624CRITICALClipBucket V5 Playlist Cover File Upload to Remote Code ExecutionEPSS 1.2%CVE-2026-80138CRITICALClipBucket V5 5.5.1 through 5.5.3-#153 OS Command Injection via Installer php_cli_filepath ParameterEPSS 1.2%CVE-2025-21623HIGHClipBucket V5 Unauthenticated Template Directory Update to Denial-of-ServiceEPSS 1.2%CVE-2026-100372HIGHClipBucket v5 before 5.5.3-#197 Path Traversal via template_editor.phpEPSS 1.1%CVE-2025-21622HIGHClipBucket V5 Avatar URL Path Traversal to Arbitrary File DeleteEPSS 1.0%