Vulnerability · Published Jan 7, 2026 · Assigned by GitHub_M
CVE-2026-21875ClipBucket v5 Vulnerable to Blind SQL Injection through Channel Comments
Critical 9.8
In plain English
A critical-severity SQL injection in clipbucket-v5 from MacWarrior. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 78% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MacWarrior | clipbucket-v5 | <= 5.5.2-#187 |
Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H