{"cve":"CVE-2022-21213","nvd":{"published":"2022-06-17T20:15:10.363","modified":"2026-06-17T04:25:45.700","status":"Modified","description":"This affects all versions of package mout. The deepFillIn function can be used to 'fill missing properties recursively', while the deepMixIn mixes objects into the target object, recursively mixing existing child objects as well. In both cases, the key used to access the target object recursively is not checked, leading to exploiting this vulnerability. **Note:** This vulnerability derives from an incomplete fix of [CVE-2020-7792](https://security.snyk.io/vuln/SNYK-JS-MOUT-1014544).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-1321"],"references":["https://github.com/mout/mout/blob/master/src/object/deepFillIn.js","https://github.com/mout/mout/blob/master/src/object/deepMixIn.js","https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-2870623","https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2870622","https://snyk.io/vuln/SNYK-JS-MOUT-2342654"],"products":["moutjs:mout"],"source":"nvd","synced_at":"2026-10-19T21:32:39.174919249+00:00"},"epss":{"cve":"CVE-2022-21213","score":0.02115,"percentile":0.81832,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vvv8-xw5f-3f88","url":"https://osv.dev/vulnerability/GHSA-vvv8-xw5f-3f88","summary":"Prototype Pollution in mout","modified":"2023-11-08T04:08:05.023118Z","packages":[{"ecosystem":"npm","name":"mout","purl":"pkg:npm/mout","ranges":["<1.2.4"],"fixed":["1.2.4"]}]}],"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."]}