CVE-2026-21875 ClipBucket v5 Vulnerable to Blind SQL Injection through Channel Comments
Attackers can execute blind SQL injection via the channel comment feature to read or modify database contents in ClipBucket v5.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21875?
CVE-2026-21875 is a critical SQL injection vulnerability in MacWarrior clipbucket-v5, published on 7 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-89
Which versions are affected by CVE-2026-21875?
It affects 1 product.
Products include Oxygenz Clipbucket.
How do I fix CVE-2026-21875?
No fix has been published for CVE-2026-21875 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-21875 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-21875 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in MacWarrior clipbucket-v5
- CVE-2025-67418 Hardcoded credentials in n/a
- CVE-2025-21624 ClipBucket V5 Playlist Cover File Upload to Remote Code Execution
- CVE-2024-54135 Untrusted Deserialization in ClipBucket-v5 Version 2.0 to 5.5.1 Revision 199
- CVE-2024-54136 Untrusted Deserialization in ClipBucket-v5 Version 5.5.1 Revision 199 and Below
- CVE-2026-25728 ClipBucket v5 Affected by Remote Code Execution via Avatar/Background File Upload Race Condition
Sources
Also known as GHSA-crpv-fmc4-j392.