Arbitrary file upload in Macwarrior Clipbucket-V5
CVE-2025-21624
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.
Vulnerability class: Unrestricted File Upload
EPSS: 0.012 (66.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Macwarrior Clipbucket-v5 — versions < 5.5.1 - 239
- Oxygenz Clipbucket
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-21624?
- CVE-2025-21624 is a critical-severity vulnerability in Macwarrior Clipbucket-V5, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2025-01-07.
- How severe is CVE-2025-21624?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-21624 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.