Lodash · Lodash · CVE-2018-3721
**Name of the Vulnerable Software and Affected Versions**
lodash versions prior to 4.17.5
**Description**
The issue allows a malicious user to modify the prototype of `Object` via ` proto `, causing the addition or modification of an existing property that will exist on all objects. This is achieved through the `defaultsDeep`, `merge`, and `mergeWith` functions.
**Recommendations**
Update to version 4.17.5 or later. As a temporary workaround, consider avoiding the use of the `defaultsDeep`, `merge`, and `mergeWith` functions until a patch is applied. Restrict access to these functions to minimize the risk of exploitation.