Any authenticated user (valid client certificate but without ACL permissions) could upload a template which contained malicious code and caused a denial of service via Java deserialization attack. The fix to properly handle Java deserialization was applied on the Apache NiFi 1.4.0 release. Users running a prior 1.x release should upgrade to the appropriate release.
[
{
"product": "Apache NiFi",
"vendor": "Apache Software Foundation",
"versions": [
{
"status": "affected",
"version": "1.0.0 - 1.3.0"
}
]
}
]