{"cve":{"cve_id":"CVE-2021-21242","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.74191,"epss_percentile":0.9942,"epss_as_of":"2026-06-23","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","published_at":"2021-01-15T20:05:27Z","last_modified_at":null,"cvss_v3_score":10.0,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-74"],"nvd_references":["https://github.com/theonedev/onedev/security/advisories/GHSA-5q3q-f373-2jv8","https://github.com/theonedev/onedev/commit/f864053176c08f59ef2d97fea192ceca46a4d9be"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:14:57.081228Z"},"effective_severity":"CRITICAL","badges":["epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"theonedev","vendor_name":"theonedev","product_slug":"onedev","product_name":"onedev","version_start":"< 4.0.3","version_start_inclusive":true,"version_end":"< 4.0.3","version_end_inclusive":true,"cpe23_uri":"cve5:theonedev:onedev:< 4.0.3:< 4.0.3"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/theonedev/onedev/security/advisories/GHSA-5q3q-f373-2jv8","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/theonedev/onedev/commit/f864053176c08f59ef2d97fea192ceca46a4d9be","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2021-01-15T20:05:27Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:05:05.516929Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:05:05.516929Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:05:05.516929Z","label":"CVSS score revised","source":"cvelistv5"}]}