CVE-2025-8447

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To exploit this vulnerability, an attacker needed to know the name of a private repository along with its branches, tags, or commit SHAs that they could use to trigger compare/diff functionality and retrieve limited code without proper authorization. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18, and was fixed in versions 3.14.17, 3.15.12, 3.16.8 and 3.17.5. This vulnerability was reported via the GitHub Bug Bounty program.</span><br>"}], "value": "An improper access control vulnerability was identified in GitHub Enterprise Server that allowed users with access to any repository to retrieve limited code content from another repository by creating a diff between the repositories. To exploit this vulnerability, an attacker needed to know the name of a private repository along with its branches, tags, or commit SHAs that they could use to trigger compare/diff functionality and retrieve limited code without proper authorization. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18, and was fixed in versions 3.14.17, 3.15.12, 3.16.8 and 3.17.5. This vulnerability was reported via the GitHub Bug Bounty program."}], "impacts": [{"capecId": "CAPEC-180", "descriptions": [{"lang": "en", "value": "CAPEC-180 Exploiting Incorrectly Configured Access Control Security Levels"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 7, "baseSeverity": "HIGH", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-639", "description": "CWE-639 Authorization Bypass Through User-Controlled Key", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "82327ea3-741d-41e4-88f8-2cf9e791e760", "shortName": "GitHub_P", "dateUpdated": "2025-08-26T01:42:37.424Z"}, "references": [{"url": "https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.17"}, {"url": "https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.12"}, {"url": "https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.8"}, {"url": "https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.5"}], "source": {"discovery": "UNKNOWN"}, "title": "Incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed read-only access", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-08-26T18:34:46.734207Z", "id": "CVE-2025-8447", "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": "2025-08-26T18:34:59.232Z"}}]}}

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This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18, and was fixed in versions 3.14.17, 3.15.12, 3.16.8 and 3.17.5. 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To exploit this vulnerability, an attacker needed to know the name of a private repository along with its branches, tags, or commit SHAs that they could use to trigger compare/diff functionality and retrieve limited code without proper authorization. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18, and was fixed in versions 3.14.17, 3.15.12, 3.16.8 and 3.17.5. This vulnerability was reported via the GitHub Bug Bounty program."}, {"lang": "es", "value": "Se identific\u00f3 una vulnerabilidad de control de acceso indebido en GitHub Enterprise Server que permit\u00eda a los usuarios con acceso a cualquier repositorio recuperar c\u00f3digo limitado de otro mediante la creaci\u00f3n de una comparaci\u00f3n entre ellos. Para explotar esta vulnerabilidad, un atacante necesitaba conocer el nombre de un repositorio privado, junto con sus ramas, etiquetas o SHA de commit, para activar la funci\u00f3n de comparaci\u00f3n y obtener c\u00f3digo limitado sin la debida autorizaci\u00f3n. Esta vulnerabilidad afect\u00f3 a todas las versiones de GitHub Enterprise Server anteriores a la 3.18 y se corrigi\u00f3 en las versiones 3.14.17, 3.15.12, 3.16.8 y 3.17.5. Se inform\u00f3 de esta vulnerabilidad a trav\u00e9s del programa de recompensas por errores de GitHub."}], "id": "CVE-2025-8447", "lastModified": "2026-06-17T10:07:00.357", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.1, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.0, "baseSeverity": "HIGH", "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/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": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "product-cna@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-8447", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-08-26T18:34:46.734207Z", "version": "2.0.3"}}]}, "published": "2025-08-26T02:15:36.270", "references": [{"source": "product-cna@github.com", "tags": ["Release Notes"], "url": "https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.17"}, {"source": "product-cna@github.com", "tags": ["Release Notes"], "url": "https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.12"}, {"source": "product-cna@github.com", "tags": ["Release Notes"], "url": "https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.8"}, {"source": "product-cna@github.com", "tags": ["Release Notes"], "url": "https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.5"}], "sourceIdentifier": "product-cna@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "product-cna@github.com", "type": "Secondary"}]}

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{"created": "2025-08-26T07:06:49.635619+00:00", "updated": "2025-08-26T07:06:49.635694+00:00", "vendors": ["github", "github$PRODUCT$enterprise_server"]}