CVE-2026-33677

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{"affected": [{"affectedData": [{"product": "vikunja", "vendor": "go-vikunja", "versions": [{"status": "affected", "version": "< 2.2.1"}]}], "source": "security-advisories@github.com"}], "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 `GET /api/v1/projects/:project/webhooks` endpoint returns webhook BasicAuth credentials (`basic_auth_user` and `basic_auth_password`) in plaintext to any user with read access to the project. While the existing code correctly masks the HMAC `secret` field, the BasicAuth fields added in a later migration were not given the same treatment. This allows read-only collaborators to steal credentials intended for authenticating against external webhook receivers. 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 'GET /API/v1/projects/:project/webhooks' devuelve las credenciales BasicAuth del webhook ('basic_auth_user' y 'basic_auth_password') en texto plano a cualquier usuario con acceso de lectura al proyecto. Si bien el c\u00f3digo existente enmascara correctamente el campo 'secret' de HMAC, los campos BasicAuth a\u00f1adidos en una migraci\u00f3n posterior no recibieron el mismo tratamiento. Esto permite a los colaboradores de solo lectura robar credenciales destinadas a la autenticaci\u00f3n contra receptores de webhook externos. La versi\u00f3n 2.2.1 corrige el problema."}], "id": "CVE-2026-33677", "lastModified": "2026-06-17T10:37:54.663", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33677", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-24T17:43:36.874513Z", "version": "2.0.3"}}]}, "published": "2026-03-24T16:16:35.113", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-7c2g-p23p-4jg3"}, {"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-200"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "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": "2026-03-27T17:27:54.500038+00:00", "value": {"mitigation_remediation": ["Upgrade to Vikunja version 2.2.1 or later to remove the exposed fields from the API response.", "If upgrading immediately is not possible, revoke or reset the BasicAuth credentials for all existing webhooks to prevent reuse.", "Limit project read\u2011only permissions to trusted users and monitor webhook configurations for accidental credential exposure."], "summary": {"action": "Patch Update", "impact": "Exposure of webhook BasicAuth credentials to users with read-only access to a project."}, "threat_synthesis": {"affected_systems": "This issue occurs in the Vikunja task\u2011management platform, specifically in releases prior to 2.2.1. Users running Vikunja 2.2.0 or older are affected; the vulnerability does not exist in version 2.2.1 or later where the fix is applied.", "description_and_impact": "The vulnerability allows any authenticated user with read access to a project to retrieve the BasicAuth user and password fields for that project's webhooks via the GET /api/v1/projects/:project/webhooks endpoint. This unwarranted disclosure can give an attacker credentials to authenticate against external webhook receivers, enabling them to send or receive data on behalf of the project without authorization. The exposed information directly undermines the confidentiality of the external webhook integration.", "risk_and_exploitability": "The CVSS score of 6.5 indicates a moderate to high severity, while the EPSS score of less than 1% suggests a low probability of widespread exploitation. The vulnerability is not listed in CISA\u2019s KEV catalog. Attackers can exploit it by simply sending a request to the listed API endpoint after authenticating with any account that has read permission to the project. No additional credentials or privileges are required beyond project\u2011read access, making the exploit path straightforward for legitimate collaborators."}}}}, "created": "2026-03-25T11:47:08.835764+00:00", "updated": "2026-03-27T20:26:38.676386+00:00", "vendors": ["go-vikunja", "go-vikunja$PRODUCT$vikunja"]}