{"id":"CVE-2021-39187","aliases":["BIT-parse-2021-39187","GHSA-xqp8-w826-hh6x"],"url":"https://o3.security/vulnerability/CVE-2021-39187","summary":"Parse Server crashes with query parameter","details":"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":"2021-09-02T16:15:07.540Z","modified":"2026-08-07T19:46:48.814309Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.01819,"percentile":0.76752,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"parse-server","fixedVersion":"4.10.3"}],"fix":{"url":"https://github.com/parse-community/parse-server/commit/308668c89474223e2448be92d6823b52c1c313ec","label":"parse-community/parse-server@308668c"},"references":[{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/releases/tag/4.10.3"},{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-xqp8-w826-hh6x"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/commit/308668c89474223e2448be92d6823b52c1c313ec"},{"type":"FIX","url":"https://jira.mongodb.org/browse/NODE-3463"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T19:46:48.814309Z"}}