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.
{
"github_reviewed_at": "2021-05-27T21:39:48Z",
"github_reviewed": true,
"severity": "MODERATE",
"nvd_published_at": "2021-05-21T22:15:00Z",
"cwe_ids": [
"CWE-918"
]
}