CVE-2023-6551

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-6551", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "state": "PUBLISHED", "assignerShortName": "CERT-PL", "dateReserved": "2023-12-06T11:18:59.869Z", "datePublished": "2024-01-04T16:04:34.995Z", "dateUpdated": "2025-06-03T14:42:21.494Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "affected", "product": "class.upload.php", "repo": "https://github.com/verot/class.upload.php", "vendor": "class.upload.php", "versions": [{"lessThanOrEqual": "*", "status": "affected", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "Krzysztof Zaj\u0105c (CERT.PL)"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<div>As a simple library, class.upload.php does not perform an in-depth check on uploaded files, allowing a stored XSS vulnerability when the default configuration is used. <br></div><div>Developers must be aware of that fact and use extension whitelisting accompanied by forcing the server to always provide content-type based on the file extension. <br></div><div>The README has been updated to include these guidelines.<br></div>"}], "value": "As a simple library, class.upload.php does not perform an in-depth check on uploaded files, allowing a stored XSS vulnerability when the default configuration is used. \n\n\nDevelopers must be aware of that fact and use extension whitelisting accompanied by forcing the server to always provide content-type based on the file extension. \n\n\nThe README has been updated to include these guidelines."}], "impacts": [{"capecId": "CAPEC-592", "descriptions": [{"lang": "en", "value": "CAPEC-592 Stored XSS"}]}, {"capecId": "CAPEC-209", "descriptions": [{"lang": "en", "value": "CAPEC-209 XSS Using MIME Type Mismatch"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-434", "description": "CWE-434 Unrestricted Upload of File with Dangerous Type", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2024-10-10T15:36:10.697Z"}, "references": [{"tags": ["third-party-advisory"], "url": "https://cert.pl/posts/2024/01/CVE-2023-6551"}, {"tags": ["third-party-advisory"], "url": "https://cert.pl/en/posts/2024/01/CVE-2023-6551"}], "source": {"discovery": "UNKNOWN"}, "title": "Stored XSS in class.upload.php", "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T08:35:14.672Z"}, "title": "CVE Program Container", "references": [{"tags": ["third-party-advisory", "x_transferred"], "url": "https://cert.pl/posts/2024/01/CVE-2023-6551"}, {"tags": ["third-party-advisory", "x_transferred"], "url": "https://cert.pl/en/posts/2024/01/CVE-2023-6551"}]}, {"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-434", "lang": "en", "description": "CWE-434 Unrestricted Upload of File with Dangerous Type"}]}], "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2025-05-08T20:16:15.657075Z", "id": "CVE-2023-6551", "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": "2025-06-03T14:42:21.494Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://cert.pl/posts/2024/01/CVE-2023-6551", "tags": ["third-party-advisory", "x_transferred"]}, {"url": "https://cert.pl/en/posts/2024/01/CVE-2023-6551", "tags": ["third-party-advisory", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T08:35:14.672Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2023-6551", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-05-08T20:16:15.657075Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-434", "description": "CWE-434 Unrestricted Upload of File with Dangerous Type"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-05-08T20:16:17.234Z"}}], "cna": {"title": "Stored XSS in class.upload.php", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "Krzysztof Zaj\u0105c (CERT.PL)"}], "impacts": [{"capecId": "CAPEC-592", "descriptions": [{"lang": "en", "value": "CAPEC-592 Stored XSS"}]}, {"capecId": "CAPEC-209", "descriptions": [{"lang": "en", "value": "CAPEC-209 XSS Using MIME Type Mismatch"}]}], "affected": [{"repo": "https://github.com/verot/class.upload.php", "vendor": "class.upload.php", "product": "class.upload.php", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "*"}], "defaultStatus": "affected"}], "references": [{"url": "https://cert.pl/posts/2024/01/CVE-2023-6551", "tags": ["third-party-advisory"]}, {"url": "https://cert.pl/en/posts/2024/01/CVE-2023-6551", "tags": ["third-party-advisory"]}], "x_generator": {"engine": "Vulnogram 0.1.0-dev"}, "descriptions": [{"lang": "en", "value": "As a simple library, class.upload.php does not perform an in-depth check on uploaded files, allowing a stored XSS vulnerability when the default configuration is used. \n\n\nDevelopers must be aware of that fact and use extension whitelisting accompanied by forcing the server to always provide content-type based on the file extension. \n\n\nThe README has been updated to include these guidelines.", "supportingMedia": [{"type": "text/html", "value": "<div>As a simple library, class.upload.php does not perform an in-depth check on uploaded files, allowing a stored XSS vulnerability when the default configuration is used. <br></div><div>Developers must be aware of that fact and use extension whitelisting accompanied by forcing the server to always provide content-type based on the file extension. <br></div><div>The README has been updated to include these guidelines.<br></div>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-434", "description": "CWE-434 Unrestricted Upload of File with Dangerous Type"}]}], "providerMetadata": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2024-10-10T15:36:10.697Z"}}}, "cveMetadata": {"cveId": "CVE-2023-6551", "state": "PUBLISHED", "dateUpdated": "2025-06-03T14:42:21.494Z", "dateReserved": "2023-12-06T11:18:59.869Z", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "datePublished": "2024-01-04T16:04:34.995Z", "assignerShortName": "CERT-PL"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"defaultStatus": "affected", "product": "class.upload.php", "repo": "https://github.com/verot/class.upload.php", "vendor": "class.upload.php", "versions": [{"lessThanOrEqual": "*", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "cvd@cert.pl"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:verot:class.upload.php:-:*:*:*:*:*:*:*", "matchCriteriaId": "A49113E8-9207-45CE-981C-4AF0D4B1EC93", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "As a simple library, class.upload.php does not perform an in-depth check on uploaded files, allowing a stored XSS vulnerability when the default configuration is used. \n\n\nDevelopers must be aware of that fact and use extension whitelisting accompanied by forcing the server to always provide content-type based on the file extension. \n\n\nThe README has been updated to include these guidelines."}, {"lang": "es", "value": "Como librer\u00eda simple, class.upload.php no realiza una verificaci\u00f3n en profundidad de los archivos cargados, lo que permite una vulnerabilidad de XSS almacenado cuando se usa la configuraci\u00f3n predeterminada. Los desarrolladores deben ser conscientes de este hecho y utilizar la lista blanca de extensiones, adem\u00e1s de obligar al servidor a proporcionar siempre el tipo de contenido seg\u00fan la extensi\u00f3n del archivo. El README se ha actualizado para incluir estas pautas."}], "id": "CVE-2023-6551", "lastModified": "2026-06-17T06:50:58.287", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-6551", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-05-08T20:16:15.657075Z", "version": "2.0.3"}}]}, "published": "2024-01-04T16:15:09.380", "references": [{"source": "cvd@cert.pl", "tags": ["Third Party Advisory"], "url": "https://cert.pl/en/posts/2024/01/CVE-2023-6551"}, {"source": "cvd@cert.pl", "tags": ["Third Party Advisory"], "url": "https://cert.pl/posts/2024/01/CVE-2023-6551"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://cert.pl/en/posts/2024/01/CVE-2023-6551"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://cert.pl/posts/2024/01/CVE-2023-6551"}], "sourceIdentifier": "cvd@cert.pl", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-434"}], "source": "cvd@cert.pl", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-434"}], "source": "nvd@nist.gov", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-434"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{}