What’s Vulnerable › Vulnerabilities

CVE-2025-21624: ClipBucket V5 Playlist Cover File Upload to Remote Code Execution

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-01-07 · updated 2026-06-17
• Weakness: CWE-434

Description

ClipBucket V5 provides open source video hosting with PHP. Prior to 5.5.1 - 239, a file upload vulnerability exists in the Manage Playlist functionality of the application, specifically surrounding the uploading of playlist cover images. Without proper checks, an attacker can upload a PHP script file instead of an image file, thus allowing a webshell or other malicious files to be stored and executed on the server. This attack vector exists in both the admin area and low-level user area. This vulnerability is fixed in 5.5.1 - 239.

Affected products

• MacWarrior clipbucket-v5: from 5.3 before 5.5.1-239 — fixed in 5.5.1-239

How to fix

Upgrade to a fixed version: MacWarrior clipbucket-v5 5.5.1-239. Check the vendor advisory for mitigations.

References

• https://github.com/MacWarrior/clipbucket-v5/commit/893bfb0f1236c4a59b5e2843ab8d27a1e491b12b
• https://github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-98vm-2xqm-xrcc
• https://github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-98vm-2xqm-xrcc

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