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CVE-2026-21875

Oxygenz Clipbucket SQL injection

9.8 CRITICALPublic exploitEPSS 1.74%
  1. Published7 Jan 2026

Description

ClipBucket v5 is an open source video sharing platform. Versions 5.5.2-#187 and below allow an attacker to perform Blind SQL Injection through the add comment section within a channel. When adding a comment within a channel, there is a POST request to the /actions/ajax.php endpoint. The obj_id parameter within the POST request to /actions/ajax.php is then used within the user_exists function of the upload/includes/classes/user.class. php file as the $id parameter. It is then used within the count function of the upload/includes/classes/db.class. php file. The $id parameter is concatenated into the query without validation or sanitization, and a user-supplied input like 1' or 1=1-- - can be used to trigger the injection. This issue does not have a fix at the time of publication.

CVSS 3.1 breakdown

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

Affected products

Oxygenz Clipbucket≥ 5.3 < 5.5.2-191

Remediation

Fixed in
Oxygenz Clipbucket≥ 5.5.2-191

References

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Frequently asked

Is CVE-2026-21875 being actively exploited?

CVE-2026-21875 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.74%.

How severe is CVE-2026-21875?

CVE-2026-21875 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.74% probability of exploitation.

Which products are affected by CVE-2026-21875?

Affected products include Oxygenz Clipbucket.

How do I fix CVE-2026-21875?

Upgrade affected software to a fixed version, for example Oxygenz Clipbucket 5.5.2-191 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-21875 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.