{"cve":"CVE-2021-47987","nvd":{"published":"2026-06-25T22:16:58.373","modified":"2026-06-26T20:22:16.713","status":"Deferred","description":"Parse Server before 4.10.0 was affected by a supply chain incident in which incorrect version tags were pushed to the official repository pointing to an unreviewed personal fork of a contributor with write access. No releases were published with these tags; a project was exposed only if it defined a git-based dependency referencing one of the affected tags (for example, parse-server#4.9.3). The code behind the tags was not reviewed or approved, and although no malicious code was identified, the introduction of security vulnerabilities could not be ruled out.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":7.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.5},"cwes":["CWE-494"],"references":["https://github.com/parse-community/parse-server/security/advisories/GHSA-593v-wcqx-hq2w","https://www.vulncheck.com/advisories/parse-server-arbitrary-code-execution-via-malicious-version-tags"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:41:17.107060303+00:00"},"epss":{"cve":"CVE-2021-47987","score":0.00178,"percentile":0.07326,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-593v-wcqx-hq2w","url":"https://osv.dev/vulnerability/GHSA-593v-wcqx-hq2w","summary":"Incorrect version tags linked to external repository","modified":"2026-09-25T14:25:42.545158671Z","packages":[{"ecosystem":"npm","name":"parse-server","purl":"pkg:npm/parse-server","ranges":[">=4.0.0 <4.5.2"],"fixed":["4.5.2"]},{"ecosystem":"npm","name":"parse-server","purl":"pkg:npm/parse-server","ranges":[">=4.6.0 <4.10.0"],"fixed":["4.10.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}