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 a Prototype Pollution.
github.com/mout/mout/blob/master/src/object/deepFillIn.js
github.com/mout/mout/blob/master/src/object/deepMixIn.js
github.com/mout/mout/commit/3fecf1333e6d71ae72edf48c71dc665e40df7605
nvd.nist.gov/vuln/detail/CVE-2020-7792
snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1050374
snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1050373
snyk.io/vuln/SNYK-JS-MOUT-1014544