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CVE-2026-25728

Oxygenz Clipbucket vulnerability

7.5 HIGHPublic exploitEPSS 0.44%
  1. Published10 Feb 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Oxygenz Clipbucket≥ 5.3 < 5.5.3-40

Remediation

Fixed in
Oxygenz Clipbucket≥ 5.5.3-40

References

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Frequently asked

Is CVE-2026-25728 being actively exploited?

CVE-2026-25728 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.44%.

How severe is CVE-2026-25728?

CVE-2026-25728 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.44% probability of exploitation.

Which products are affected by CVE-2026-25728?

Affected products include Oxygenz Clipbucket.

How do I fix CVE-2026-25728?

Upgrade affected software to a fixed version, for example Oxygenz Clipbucket 5.5.3-40 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-25728 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.