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TI-2026-20797 Aliases CVE-2026-25728

ClipBucket v5 Affected by Remote Code Execution via Avatar/Background File Upload Race Condition

Priority HIGH 81CWE-367Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00331 26th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MacWarriorclipbucket-v5< 5.5.3 - #40—No fix listedCNA
  • clipbucket-v5 VendorMacWarrior Affected < 5.5.3 - #40 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:oxygenz:clipbucket:*:*:*:*:*:*:*:*5.3 to before 5.5.3-40VulnerableMacWarrior
  • cpe:2.3:a:oxygenz:clipbucket:*:*:*:*:*:*:*:* Versions 5.3 to before 5.5.3-40 Vulnerable ·MacWarrior

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-25728

References

Exploit 1

Patch 1

  • TI-2026-17576 ClipBucket v5 Vulnerable to Blind SQL Injection through Channel Comments CVSS 3.1CRITICAL 9.8
  • TI-2025-41207 ClipBucket 5.5.2 is affected by an improper access control issue where the product is… CVSS 3.1CRITICAL 9.8
  • TI-2025-15584 ClipBucket V5 Playlist Cover File Upload to Remote Code Execution CVSS 3.1CRITICAL 9.8
  • TI-2024-36252 Untrusted Deserialization in ClipBucket-v5 Version 5.5.1 Revision 199 and Below CVSS 3.1CRITICAL 9.8
  • TI-2024-36251 Untrusted Deserialization in ClipBucket-v5 Version 2.0 to 5.5.1 Revision 199 CVSS 3.1CRITICAL 9.8
  • TI-2025-15582 ClipBucket V5 Avatar URL Path Traversal to Arbitrary File Delete CVSS 3.1CRITICAL 9.1
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences