Plone through 5.2.4 allows remote authenticated managers to conduct SSRF attacks via an event ical URL, to read one line of a file.
{ "nvd_published_at": "2021-05-21T22:15:00Z", "cwe_ids": [ "CWE-918" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2021-05-27T21:39:48Z" }