Vulnerability Details CVE-2026-25728
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 15.6%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2026-25728
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cpe:2.3:a:oxygenz:clipbucket:5.3
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cpe:2.3:a:oxygenz:clipbucket:5.3.1
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cpe:2.3:a:oxygenz:clipbucket:5.4.0
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cpe:2.3:a:oxygenz:clipbucket:5.4.1
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cpe:2.3:a:oxygenz:clipbucket:5.5.0
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cpe:2.3:a:oxygenz:clipbucket:5.5.1
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cpe:2.3:a:oxygenz:clipbucket:5.5.1-141
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cpe:2.3:a:oxygenz:clipbucket:5.5.1-200
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cpe:2.3:a:oxygenz:clipbucket:5.5.1-237
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cpe:2.3:a:oxygenz:clipbucket:5.5.1-238
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cpe:2.3:a:oxygenz:clipbucket:5.5.1-239
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-103
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-106
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-114
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-117
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-120
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-123
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-129
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-133
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-135
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-138
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-140
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-141
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-142
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-145
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-146
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-147
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-152
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-156
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-157
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-162
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-163
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-164
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-74
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-82
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-86
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-90
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cpe:2.3:a:oxygenz:clipbucket:5.5.2-98