Vanilla before 2.5.5 and 2.6.x before 2.6.2 allows Remote Code Execution because authenticated administrators have a reachable call to unserialize in the Gdn_Format class.
{ "versions": [ { "introduced": "0" }, { "fixed": "2.5.5" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-19499.json"
[ { "events": [ { "introduced": "2.6.0" }, { "fixed": "2.6.2" } ] } ]