{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-33700", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-23T17:06:05.746Z", "datePublished": "2026-03-24T15:51:40.172Z", "dateUpdated": "2026-03-24T18:04:42.445Z"}, "containers": {"cna": {"title": "Vikunja has a Link Share Delete IDOR \u2014 Missing Project Ownership Check Allows Cross-Project Link Share Deletion", "problemTypes": [{"descriptions": [{"cweId": "CWE-639", "lang": "en", "description": "CWE-639: Authorization Bypass Through User-Controlled Key", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM", "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", "version": "4.0"}}], "references": [{"name": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-f95f-77jx-fcjc", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-f95f-77jx-fcjc"}, {"name": "https://vikunja.io/changelog/vikunja-v2.2.2-was-released", "tags": ["x_refsource_MISC"], "url": "https://vikunja.io/changelog/vikunja-v2.2.2-was-released"}], "affected": [{"vendor": "go-vikunja", "product": "vikunja", "versions": [{"version": "< 2.2.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-24T15:51:40.172Z"}, "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."}], "source": {"advisory": "GHSA-f95f-77jx-fcjc", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-24T18:04:33.052328Z", "id": "CVE-2026-33700", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-24T18:04:42.445Z"}}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*", "matchCriteriaId": "E8647862-9C78-473D-9FED-7AFC24335A61", "versionEndExcluding": "2.2.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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 gesti\u00f3n de tareas de c\u00f3digo abierto autoalojada. Antes de la versi\u00f3n 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 versi\u00f3n 2.2.1 corrige el problema."}], "id": "CVE-2026-33700", "lastModified": "2026-03-30T13:35:39.900", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-24T16:16:35.857", "references": [{"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-f95f-77jx-fcjc"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://vikunja.io/changelog/vikunja-v2.2.2-was-released"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.2.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "vikunja", "source": "cna", "vendor": "go-vikunja"}, "product": "vikunja", "vendor": "go-vikunja"}], "analysis": {"en": {"generated_at": "2026-03-30T14:36:48.629537+00:00", "value": {"mitigation_remediation": ["Upgrade Vikunja to version 2.2.1 or later"], "summary": {"action": "Immediate Patch", "impact": "IDOR allowing admin users to delete link shares from other projects"}, "threat_synthesis": {"affected_systems": "Open\u2011source task management platform Vikunja, developed by go\u2011vikunja. Versions prior to 2.2.1 are affected, as the patch is included in 2.2.1 and later releases.", "description_and_impact": "Vikunja\u2019s delete endpoint for link shares does not verify that the share belongs to the project in the URL, creating an improper access control flaw. An attacker who has administrative privileges on any project can supply a different project identifier and a valid share identifier to remove link shares from projects they do not own. The result is an unauthorized deletion of shared links, which can disrupt collaborative workflows and potentially expose shared resources by removing access. The vulnerability does not provide direct code execution but impacts the integrity and availability of cross\u2011project link shares.", "risk_and_exploitability": "The CVSS score of 6.9 indicates moderate severity, and the EPSS score of less than 1% shows a low likelihood of exploitation in the wild. The flaw is not listed in CISA\u2019s KEV catalog. Exploitation requires authenticated admin access to any project, after which an attacker crafts a DELETE request with a target share ID and an arbitrary project ID to delete cross\u2011project shares. No additional conditions or payloads are required beyond valid authentication and the share ID target."}}}}, "created": "2026-03-25T11:47:04.262420+00:00", "updated": "2026-03-30T20:58:04.561462+00:00", "vendors": ["go-vikunja", "go-vikunja$PRODUCT$vikunja"]}