{"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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{"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": "2026-03-25T15:41:58.280", "metrics": {"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", "url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-f95f-77jx-fcjc"}, {"source": "security-advisories@github.com", "url": "https://vikunja.io/changelog/vikunja-v2.2.2-was-released"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "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": "2026-03-24T17:20:56.098580+00:00", "value": {"mitigation_remediation": ["Update Vikunja to version 2.2.1 or later", "If an upgrade is not immediately possible, limit administrative rights to trusted personnel and enforce least\u2011privilege policies", "Enable and review audit logs for unauthorized share deletions to detect potential misuse"], "summary": {"action": "Patch Now", "impact": "Unrestricted deletion of link shares across projects via IDOR"}, "threat_synthesis": {"affected_systems": "Vikunja, the open\u2011source task management platform maintained by go\u2011vikunja. All releases prior to 2.2.1 are vulnerable; version 2.2.1 and later include the fix.", "description_and_impact": "The /api/v1/projects/:project/shares/:share endpoint fails to verify whether the link share belongs to the specified project. An attacker who has administrative rights in any project can supply another project's ID together with a target share ID to delete that share. This omission creates an Insecure Direct Object Reference (CWE\u2011639), allowing an attacker to remove shared links that belong to other teams, potentially causing data loss or service disruption.", "risk_and_exploitability": "The CVSS score of 6.9 indicates moderate severity. Exploitability depends on the attacker\u2019s ability to obtain or assume administrative privileges within any project. Since EPSS data is unavailable and the flaw is not listed in CISA\u2019s KEV catalog, the threat is not known to be actively exploited yet, but the absence of a project ownership check renders the attack path straightforward for privileged users."}}}}, "created": "2026-03-25T11:47:04.262420+00:00", "updated": "2026-03-25T20:49:49.771842+00:00", "vendors": ["go-vikunja", "go-vikunja$PRODUCT$vikunja"]}