CVE-2021-21242

Pre-Auth Unsafe Deserialization on AttachmentUploadServet

View on CVE.org

Published Jan 15, 2021 CVSS 3.1 · 10 Critical EPSS 74.2% KEV · Not listed

Description

OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, there is a critical vulnerability which can lead to pre-auth remote code execution. AttachmentUploadServlet deserializes untrusted data from the `Attachment-Support` header. This Servlet does not enforce any authentication or authorization checks. This issue may lead to pre-auth remote code execution. This issue was fixed in 4.0.3 by removing AttachmentUploadServlet and not using deserialization

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

theonedev

onedev

affected

Version	Status	Constraints
`< 4.0.3`	affected	—

Configuration 1 [-]

cpe:2.3:a:onedev_project:onedev:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: 74.2% (74.191% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/theonedev/onedev/commit/f864053176c08f59ef2d97fea192ceca46a4d9be
https://github.com/theonedev/onedev/security/advisories/GHSA-5q3q-f373-2jv8

History

No history.

Subscriptions

Onedev Project Onedev

Weaknesses

Sources

CVE record Updated: Aug 3, 2024, 6:09 PM

Status: PUBLISHED
Assigner: GitHub_M
Published: Jan 15, 2021, 8:05 PM
Updated: Aug 3, 2024, 6:09 PM
Reserved: Dec 22, 2020, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:35 AM

Status: Modified
Published: Jan 15, 2021, 9:15 PM
Modified: Jun 17, 2026, 3:35 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

{"containers": {"cna": {"affected": [{"product": "onedev", "vendor": "theonedev", "versions": [{"status": "affected", "version": "< 4.0.3"}]}], "descriptions": [{"lang": "en", "value": "OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, there is a critical vulnerability which can lead to pre-auth remote code execution. AttachmentUploadServlet deserializes untrusted data from the `Attachment-Support` header. This Servlet does not enforce any authentication or authorization checks. This issue may lead to pre-auth remote code execution. This issue was fixed in 4.0.3 by removing AttachmentUploadServlet and not using deserialization"}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 10, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-74", "description": "CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-01-15T20:05:27.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/theonedev/onedev/security/advisories/GHSA-5q3q-f373-2jv8"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/theonedev/onedev/commit/f864053176c08f59ef2d97fea192ceca46a4d9be"}], "source": {"advisory": "GHSA-5q3q-f373-2jv8", "discovery": "UNKNOWN"}, "title": "Pre-Auth Unsafe Deserialization on AttachmentUploadServet", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-21242", "STATE": "PUBLIC", "TITLE": "Pre-Auth Unsafe Deserialization on AttachmentUploadServet"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "onedev", "version": {"version_data": [{"version_value": "< 4.0.3"}]}}]}, "vendor_name": "theonedev"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, there is a critical vulnerability which can lead to pre-auth remote code execution. AttachmentUploadServlet deserializes untrusted data from the `Attachment-Support` header. This Servlet does not enforce any authentication or authorization checks. This issue may lead to pre-auth remote code execution. This issue was fixed in 4.0.3 by removing AttachmentUploadServlet and not using deserialization"}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 10, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')"}]}]}, "references": {"reference_data": [{"name": "https://github.com/theonedev/onedev/security/advisories/GHSA-5q3q-f373-2jv8", "refsource": "CONFIRM", "url": "https://github.com/theonedev/onedev/security/advisories/GHSA-5q3q-f373-2jv8"}, {"name": "https://github.com/theonedev/onedev/commit/f864053176c08f59ef2d97fea192ceca46a4d9be", "refsource": "MISC", "url": "https://github.com/theonedev/onedev/commit/f864053176c08f59ef2d97fea192ceca46a4d9be"}]}, "source": {"advisory": "GHSA-5q3q-f373-2jv8", "discovery": "UNKNOWN"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T18:09:14.970Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/theonedev/onedev/security/advisories/GHSA-5q3q-f373-2jv8"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/theonedev/onedev/commit/f864053176c08f59ef2d97fea192ceca46a4d9be"}]}]}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2021-21242", "datePublished": "2021-01-15T20:05:27.000Z", "dateReserved": "2020-12-22T00:00:00.000Z", "dateUpdated": "2024-08-03T18:09:14.970Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "onedev", "vendor": "theonedev", "versions": [{"status": "affected", "version": "< 4.0.3"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:onedev_project:onedev:*:*:*:*:*:*:*:*", "matchCriteriaId": "5287F01C-3A77-4491-AB49-401A50FAA6E9", "versionEndExcluding": "4.0.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, there is a critical vulnerability which can lead to pre-auth remote code execution. AttachmentUploadServlet deserializes untrusted data from the `Attachment-Support` header. This Servlet does not enforce any authentication or authorization checks. This issue may lead to pre-auth remote code execution. This issue was fixed in 4.0.3 by removing AttachmentUploadServlet and not using deserialization"}, {"lang": "es", "value": "OneDev es una plataforma devops todo en uno. En OneDev versiones anteriores a 4.0.3, Se presenta una vulnerabilidad cr\u00edtica que puede conllevar a una ejecuci\u00f3n de c\u00f3digo remota previa a la autenticaci\u00f3n. El componente AttachmentUploadServlet deserializa los datos no confiables desde el encabezado \"Attachment-Support\". Este Servlet no aplica ninguna comprobaci\u00f3n de autenticaci\u00f3n o autorizaci\u00f3n. Este problema puede causar una ejecuci\u00f3n de c\u00f3digo remota previa a la autenticaci\u00f3n. Este problema es corregido en versi\u00f3n 4.0.3 al eliminar AttachmentUploadServlet y no usar la deserializaci\u00f3n"}], "id": "CVE-2021-21242", "lastModified": "2026-06-17T03:35:06.800", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.8, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-01-15T21:15:13.227", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/theonedev/onedev/commit/f864053176c08f59ef2d97fea192ceca46a4d9be"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/theonedev/onedev/security/advisories/GHSA-5q3q-f373-2jv8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/theonedev/onedev/commit/f864053176c08f59ef2d97fea192ceca46a4d9be"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/theonedev/onedev/security/advisories/GHSA-5q3q-f373-2jv8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-74"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-502"}], "source": "nvd@nist.gov", "type": "Primary"}]}