CVE-2021-3987

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{"affected": [{"affectedData": [{"product": "janeczku/calibre-web", "vendor": "janeczku", "versions": [{"lessThanOrEqual": "latest", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "security@huntr.dev"}, {"affectedData": [{"cpes": ["cpe:2.3:a:calibre-web_project:calibre-web:-:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "product": "calibre-web", "vendor": "calibre-web_project", "versions": [{"lessThan": "*", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:janeczku:calibre-web:*:*:*:*:*:*:*:*", "matchCriteriaId": "CB86DF8E-5F67-41CA-B657-D8E0A61CD22A", "versionEndExcluding": "0.6.15", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An improper access control vulnerability exists in janeczku/calibre-web. The affected version allows users without public shelf permissions to create public shelves. The vulnerability is due to the `create_shelf` method in `shelf.py` not verifying if the user has the necessary permissions to create a public shelf. This issue can lead to unauthorized actions being performed by users."}, {"lang": "es", "value": "Existe una vulnerabilidad de control de acceso indebido en janeczku/calibre-web. La versi\u00f3n afectada permite a los usuarios sin permisos de estanter\u00eda p\u00fablica crear estanter\u00edas p\u00fablicas. La vulnerabilidad se debe a que el m\u00e9todo `create_shelf` en `shelf.py` no verifica si el usuario tiene los permisos necesarios para crear una estanter\u00eda p\u00fablica. Este problema puede provocar que los usuarios realicen acciones no autorizadas."}], "id": "CVE-2021-3987", "lastModified": "2026-06-17T04:06:20.773", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.0"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "security@huntr.dev", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-3987", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-11-15T18:27:02.281125Z", "version": "2.0.3"}}]}, "published": "2024-11-15T11:15:06.610", "references": [{"source": "security@huntr.dev", "tags": ["Patch"], "url": "https://github.com/janeczku/calibre-web/commit/bcdc97641447965af486964537f3821f47b28874"}, {"source": "security@huntr.dev", "tags": ["Exploit"], "url": "https://huntr.com/bounties/29fcc091-87b6-43bc-ab4b-3c0bec3f71df"}], "sourceIdentifier": "security@huntr.dev", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "security@huntr.dev", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-862"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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