CVE-2026-28354
Received Received - Intake
Authorization Bypass in ClipBucket v5 Allows Collection Item Manipulation

Publication date: 2026-02-27

Last updated on: 2026-03-03

Assigner: GitHub, Inc.

Description
ClipBucket v5 is an open source video sharing platform. Prior to version 5.5.3 #59, collection item operations are vulnerable to authorization flaws, allowing a normal authenticated user to modify another user’s collection items. This affects both add item (/actions/add_to_collection.php) due to missing authorization checks and delete item (/manage_collections.php?mode=manage_items...) due to a broken ownership check in removeItemFromCollection(). As a result, attackers can insert and remove items from collections they do not own. Version 5.5.3 #59 fixes the issue.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-02-27
Last Modified
2026-03-03
Generated
2026-06-16
AI Q&A
2026-02-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-28354
EUVD
EUVD-2026-9062
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
oxygenz clipbucket From 5.3 (inc) to 5.5.3-59 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability affects ClipBucket v5, an open source video sharing platform, prior to version 5.5.3 #59. It involves authorization flaws in collection item operations, specifically in adding and deleting items from collections. Normal authenticated users can exploit missing authorization checks and broken ownership verification to modify collection items that belong to other users. This means attackers can insert or remove items from collections they do not own.

Impact Analysis

The vulnerability allows an attacker with normal user privileges to modify other users' collection items without proper authorization. This can lead to unauthorized changes in collections, such as adding unwanted content or deleting legitimate items, potentially disrupting user experience, damaging trust, or causing data integrity issues within the platform.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

The vulnerability in ClipBucket v5 prior to version 5.5.3 #59 allows unauthorized modification of collection items by authenticated users due to missing authorization and broken ownership checks.

To mitigate this vulnerability immediately, upgrade ClipBucket to version 5.5.3 #59 or later, where the issue has been fixed.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-28354. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart