ClipBucket v5 Vulnerable to Blind SQL Injection through Channel Comments

{
  "id": "6ecf7b965dc3c3b83a1e6838657fdbb1918e96fdb0faad8e101eee59d0e30395",
  "url": "https://osv.dev/vulnerability/CVE-2026-21875",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ClipBucket v5 Vulnerable to Blind SQL Injection through Channel Comments",
    "summary": "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.",
    "evidence": "osv:CVE-2026-21875",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-21875",
      "aliases": [
        "CVE-2026-21875",
        "GHSA-crpv-fmc4-j392"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/macwarrior/clipbucket-v5",
              "type": "GIT",
              "events": [
                {
                  "introduced": "100b79b02d67dfb1abaa89b21434a04f15736875"
                },
                {
                  "last_affected": "100b79b02d67dfb1abaa89b21434a04f15736875"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "<= 5.5.2-#187"
                      },
                      {
                        "last_affected": "<= 5.5.2-#187"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  }
                ]
              }
            }
          ],
          "versions": [
            "<= 5.5.2-#187",
            "5.5.2-#187"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21875.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.524718979Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21875.json",
        "https://github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-crpv-fmc4-j392",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-21875"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-89"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21875.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-21875",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498553,
  "published_at": "2026-01-07T23:52:18.729+00:00"
}