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.

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Fixes

Solution

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Workaround

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History

Wed, 18 Feb 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Oxygenz
Oxygenz clipbucket
CPEs cpe:2.3:a:oxygenz:clipbucket:*:*:*:*:*:*:*:*
Vendors & Products Oxygenz
Oxygenz clipbucket
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}


Wed, 11 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 10 Feb 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Macwarrior
Macwarrior clipbucket-v5
Vendors & Products Macwarrior
Macwarrior clipbucket-v5

Tue, 10 Feb 2026 17:30:00 +0000

Type Values Removed Values Added
Description 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.
Title ClipBucket v5 Affected by Remote Code Execution via Avatar/Background File Upload Race Condition
Weaknesses CWE-367
References
Metrics cvssV4_0

{'score': 9.3, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-11T15:30:33.904Z

Reserved: 2026-02-05T16:48:00.426Z

Link: CVE-2026-25728

cve-icon Vulnrichment

Updated: 2026-02-11T15:30:04.295Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-10T18:16:38.053

Modified: 2026-02-18T15:02:02.293

Link: CVE-2026-25728

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-10T21:41:58Z

Weaknesses