The REST Plugin in Apache Struts 2.3.7 through 2.3.33 and 2.5 through 2.5.12 is using an outdated XStream library which is vulnerable and allow perform a DoS attack using malicious request with specially crafted XML payload.
{
"cwe_ids": [
"CWE-20"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:58:41Z",
"nvd_published_at": null,
"severity": "HIGH"
}