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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Oxygenz | Clipbucket | >= 5.3, < 5.5.3-40 |
Related Weaknesses (CWE)
References
- https://github.com/MacWarrior/clipbucket-v5/commit/09536e6e2ca6d69a2ee83190b588cPatch
- https://github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-xq7c-m5r2-9ExploitMitigationVendor Advisory
- https://github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-xq7c-m5r2-9ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-25728?
CVE-2026-25728 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 up...
How severe is CVE-2026-25728?
CVE-2026-25728 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-25728?
Check the references section above for vendor advisories and patch information. Affected products include: Oxygenz Clipbucket.