{"cve":{"cve_id":"CVE-2021-39187","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":0.01761,"epss_percentile":0.75107,"epss_as_of":"2026-06-23","description":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to version 4.10.3, Parse Server crashes when if a query request contains an invalid value for the `explain` option. This is due to a bug in the MongoDB Node.js driver which throws an exception that Parse Server cannot catch. There is a patch for this issue in version 4.10.3. No workarounds aside from upgrading are known to exist.","published_at":"2021-09-02T15:35:11Z","last_modified_at":null,"cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"HIGH","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/parse-community/parse-server/security/advisories/GHSA-xqp8-w826-hh6x","https://github.com/parse-community/parse-server/commit/308668c89474223e2448be92d6823b52c1c313ec","https://github.com/parse-community/parse-server/releases/tag/4.10.3","https://jira.mongodb.org/browse/NODE-3463"],"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":"2026-06-28T23:16:04.157919Z"},"effective_severity":"HIGH","badges":[],"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":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"parse-community","vendor_name":"parse-community","product_slug":"parse-server","product_name":"parse-server","version_start":"< 4.10.3","version_start_inclusive":true,"version_end":"< 4.10.3","version_end_inclusive":true,"cpe23_uri":"cve5:parse-community:parse-server:< 4.10.3:< 4.10.3"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-xqp8-w826-hh6x","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/parse-community/parse-server/commit/308668c89474223e2448be92d6823b52c1c313ec","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/parse-community/parse-server/releases/tag/4.10.3","source_type":"PATCH","tags":["patch"]},{"url":"https://jira.mongodb.org/browse/NODE-3463","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2021-09-02T15:35:11Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:19:13.816922Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:19:13.816922Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:19:13.816922Z","label":"CVSS score revised","source":"cvelistv5"}]}