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I. Basic Information for CVE-2026-25728
Vulnerability Information

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Vulnerability Title
ClipBucket v5 Affected by Remote Code Execution via Avatar/Background File Upload Race Condition
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: NVD (National Vulnerability Database)
Vulnerability Title
ClipBucket 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ClipBucket是MacWarrior开源的一个开源且可免费下载的 PHP 脚本。用于共享视频网站。 ClipBucket 5.5.3 - #40之前版本存在安全漏洞,该漏洞源于头像和背景图片上传功能存在竞争条件,可能导致执行任意PHP代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
MacWarriorclipbucket-v5 < 5.5.3 - #40 -
II. Public POCs for CVE-2026-25728
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III. Intelligence Information for CVE-2026-25728
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IV. Related Vulnerabilities
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