CVE-2026-21875

CVE-2026-21875 is a critical-severity vulnerability in Oxygenz Clipbucket with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

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.

Frequently asked questions

What is CVE-2026-21875?
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.
How severe is CVE-2026-21875?
CVE-2026-21875 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-21875 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21875?
CVE-2026-21875 affects Oxygenz Clipbucket. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21875?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-21875 have an EU (EUVD) identifier?
Yes. CVE-2026-21875 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1662.
When was CVE-2026-21875 published?
CVE-2026-21875 was published on 2026-01-08 and last updated on 2026-06-17.

References

Affected products (1)

More vulnerabilities in Oxygenz Clipbucket

All CVEs affecting Oxygenz Clipbucket →

Other CWE-89 (SQL Injection) vulnerabilities

Browse all CWE-89 (SQL Injection) vulnerabilities →