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CVE-2026-21875— ClipBucket v5 Vulnerable to Blind SQL Injection through Channel Comments

Quick assessment

Affected
MacWarrior clipbucket-v5
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ClipBucket是MacWarrior开源的一个开源且可免费下载的 PHP 脚本。用于共享视频网站。 ClipBucket v5 5.5.2-#187及之前版本存在SQL注入漏洞，该漏洞源于对/actions/ajax.php端点中obj_id参数未经验证或清理，可能导致盲SQL注入。

CVSS 9.8 · Critical EPSS 1.76% · P77

Public Exploits 1

Nuclei · 1 CVE-2026-21875.yaml [template]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-21875

Vulnerability Information
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Vulnerability Title
ClipBucket v5 Vulnerable to Blind SQL Injection through Channel Comments
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
ClipBucket SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ClipBucket是MacWarrior开源的一个开源且可免费下载的 PHP 脚本。用于共享视频网站。 ClipBucket v5 5.5.2-#187及之前版本存在SQL注入漏洞，该漏洞源于对/actions/ajax.php端点中obj_id参数未经验证或清理，可能导致盲SQL注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
MacWarrior clipbucket-v5 <= 5.5.2-#187 -

II. Public POCs for CVE-2026-21875

# POC Description Source Link Shenlong Link
1 ClipBucket v5.5.2-#187 and below contain a blind SQL injection caused by unsanitized obj_id parameter in /actions/ajax.php used in user_exists function, letting attackers perform blind SQL injection remotely, exploit requires crafted POST request. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-21875.yaml POC Details
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III. Intelligence Information for CVE-2026-21875

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Vendor Advisories for CVE-2026-21875 (1)

IV. Related Vulnerabilities

Same product: clipbucket-v5
Same vendor: MacWarrior
Same weakness: CWE-89

V. Comments for CVE-2026-21875

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