CVE-2025-6544

{"id": "CVE-2025-6544", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-6544", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2025-09-22T17:23:22.604678Z"}}], "cvssMetricV30": [{"type": "Secondary", "source": "security@huntr.dev", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@huntr.dev", "affectedData": [{"vendor": "h2oai", "product": "h2oai/h2o-3", "versions": [{"status": "affected", "version": "unspecified", "lessThan": "3.46.8", "versionType": "custom"}]}]}], "published": "2025-09-21T09:15:38.497", "references": [{"url": "https://github.com/h2oai/h2o-3/commit/0298ee348f5c73673b7b542158081e79605f5f25", "tags": ["Patch"], "source": "security@huntr.dev"}, {"url": "https://huntr.com/bounties/53f35a0f-d644-4f82-93aa-89fe7e0aed40", "tags": ["Exploit", "Third Party Advisory"], "source": "security@huntr.dev"}, {"url": "https://huntr.com/bounties/53f35a0f-d644-4f82-93aa-89fe7e0aed40", "tags": ["Exploit", "Third Party Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@huntr.dev", "description": [{"lang": "en", "value": "CWE-502"}]}], "descriptions": [{"lang": "en", "value": "A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.8, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arises from improper handling of JDBC connection parameters, which can be exploited by bypassing regular expression checks and using double URL encoding. This issue impacts all users of the affected versions."}, {"lang": "es", "value": "Una vulnerabilidad de deserializaci\u00f3n existe en las versiones de h2oai/h2o-3 menor o igual a 3.46.0.8, permitiendo a los atacantes leer archivos arbitrarios del sistema y ejecutar c\u00f3digo arbitrario. La vulnerabilidad surge de un manejo inadecuado de los par\u00e1metros de conexi\u00f3n JDBC, que puede ser explotada al eludir las comprobaciones de expresiones regulares y utilizando doble codificaci\u00f3n URL. Este problema afecta a todos los usuarios de las versiones afectadas."}], "lastModified": "2026-10-05T14:10:00.267", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:h2o:h2o:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C42D7D77-4B1B-4BD7-84F3-300395BF31EB", "versionEndIncluding": "3.46.0.8", "versionStartIncluding": "3.0.0.2"}], "operator": "OR"}]}], "sourceIdentifier": "security@huntr.dev"}