Jenkins 2.333 and earlier, LTS 2.319.2 and earlier defines custom XStream converters that have not been updated to apply the protections for the vulnerability CVE-2021-43859 and allow unconstrained resource usage.
{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "2.319.3"
},
{
"fixed": "2.334"
}
],
"cpe": [
"cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*",
"cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*"
],
"source": "CPE_RANGE"
}