The Live Preview endpoint for existing entries and terms only checked view authorization, but it accepts and renders caller-supplied field values. A Control Panel user with view but not edit permission could therefore submit content they were not authorized to author and generate a shareable Live Preview URL rendering it.
This has been fixed in 5.74.0 and 6.20.3.
{
"nvd_published_at": null,
"cwe_ids": [
"CWE-863"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-26T23:10:37Z",
"severity": "LOW"
}