{"id":"CVE-2021-33510","aliases":["GHSA-4mg4-wvmx-5332","PYSEC-2021-82"],"url":"https://o3.security/vulnerability/CVE-2021-33510","summary":"Server-Side Request Forgery in Plone","details":"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.","published":"2021-05-21T22:15:08.567Z","modified":"2026-07-08T21:27:05.937563Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"plone","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/05/22/1"},{"type":"ADVISORY","url":"https://plone.org/security/hotfix/20210518/server-side-request-forgery-via-event-ical-url"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T21:27:05.937563Z"}}